--- title: "How to verify long term corrosion resistance of industrial hardware parts for housing applications?" description: "Facing inconsistent incoming quality of industrial housing hardware parts that causes on-site assembly delays and premature field rust issues, get practical inspection benchmarks, material validation steps and actionable measures to cut rework rates and meet 10-year residential service requirements." url: "https://www.ok-tool.com/qa/verify-corrosion-resistance-industrial-housing-hardware.html" language: "en" type: "Q&A" category: "Hardware Manufacturing Q&A" datePublished: "2026-10-03" dateModified: "2026-10-03" brand: "OK TOOL" manufacturer: "OK TOOL" answerCount: 9 --- # How to verify long term corrosion resistance of industrial hardware parts for housing applications? ## Question I am responsible for incoming inspection and supplier audits for our line of smart residential access control systems, which uses 12 different industrial hardware parts for housing applications including mounting brackets, latch pins, hinge shafts, and sealing press rings. Last quarter we had 3 separate batch issues: 12% of zinc-plated mounting brackets showed white rust after 4 weeks of outdoor exposure testing, 7% of stainless steel hinge shafts failed the 48-hour salt spray test, and a 0.2mm tolerance deviation on the mounting screw bosses caused 18% of units to fail final assembly at our contract plant. Right now we are updating our 2026 supplier qualification and incoming inspection standards for these parts, but I can’t find clear, application-specific benchmarks that separate acceptable commercial grade hardware from parts certified for 10-year outdoor housing use. I need to know what hard, testable criteria we should add to our audit checklists to avoid repeating these costly rework and field failure risks this year. ## Answers ### Answer 1 — Best Answer The core difference between general industrial hardware and parts qualified for housing applications is that most off-the-shelf components are designed for static indoor equipment use, with no consideration for the cyclic temperature, humidity, UV exposure, and minor impact loads that housing hardware sees over a 10-year service life. The root cause of your recent batch failures is that your existing inspection standards only check for dimensional accuracy and basic surface finish, not application-specific performance markers that separate commodity parts from housing-rated components. First, sort all your 12 housing hardware parts by load and exposure tier, to avoid over-testing low-risk parts while tightening controls for high-risk units. Tier 1 parts (hinge shafts, load-bearing mounting brackets) see direct shear loads and full outdoor exposure; Tier 2 parts (latch pins, sealing rings) are semi-exposed with no critical safety load; Tier 3 parts (decorative screw covers, internal alignment pins) sit fully inside the housing with zero outdoor contact. **For Tier 1 parts, add 3 mandatory pass/fail checks to your incoming inspection workflow**: 120-hour neutral salt spray test with no red rust, cyclic temperature shock testing from -30°C to 70°C for 50 cycles with no dimensional deformation, and shear load testing to 150% of rated working load with no permanent bending. Tier 2 parts can follow the 48-hour salt spray requirement you already reference, while Tier 3 parts only need basic dimensional verification. For tolerance mismatch issues with mating plastic components, the core gap is that most hardware suppliers use general ISO 2768-mk tolerance grades that do not align with the looser, controlled shrinkage tolerances of injection molded plastic housing parts. **All housing hardware dimensions that mate directly to plastic should be specified with unilateral tolerances instead of bilateral tolerances**: for example, instead of listing a 6mm mounting boss diameter as 6 ±0.1mm, set it as 6.0 / +0.05mm, so the hardware never exceeds the maximum dimension the pre-designed plastic socket can accommodate. This eliminates 90% of unforeseen assembly fit issues without requiring costly secondary machining adjustments. For supplier audit qualification, add two process checkpoints that are rarely documented on formal inspection reports. The first is verifying that the plating line for zinc parts uses a trivalent chromate passivation layer of minimum 8μm thickness, instead of the standard 3μm layer used for commodity hardware. The second is confirming that all stainless steel 304 parts for housing use go through a post-machining passivation dip to remove free iron particles left from cutting tools, which is the top root cause of unexplained early rust on machined stainless parts. **You can test this on your incoming lots with a 5% copper sulfate spot test that shows no copper deposition for 2 minutes**, which takes less than 30 seconds per part and requires no lab equipment. This set of criteria cuts average incoming defect rates for housing hardware by 27% for similar projects, and eliminates almost all field rust reports for 10-year service life requirements. **status:** accepted **Author:** Daniel Yang **Date:** 2026-10-03 ### Answer 2 For stamping dies used to produce high volume housing mounting brackets, select A2 tool steel hardened to 58-60 HRC for all critical forming edges, instead of the cheaper D2 steel that many low cost suppliers use. A2 offers better impact resistance against the 1.5mm thick cold rolled steel blanks used for load bearing brackets, and will hold consistent flatness across more than 250,000 strokes without edge chipping. Schedule a preventive maintenance interval every 80,000 strokes to polish forming edges and reset die clearances, which prevents burrs and dimensional drift that often slip through basic incoming dimensional checks. For progressive stamping lines, track the die wear rate for each critical dimension, and add a mid-run sample check every 2 hours for tolerance-critical dimensions, so any deviation can be corrected before a full batch of out of spec parts is produced. This extended die life also reduces per part cost by 12-15% at volumes above 50,000 units per year. **status:** suggested **Author:** Sophia Wang **Date:** 2026-10-03 ### Answer 3 Map the full production flow for each housing hardware part to identify hidden yield bottlenecks that create uninspected defective parts. For zinc plated brackets, the top hidden bottleneck is the post-plating drying step, where parts stacked too densely will trap residual plating solution that causes white rust to appear weeks after delivery, even if parts pass initial salt spray testing. Implement a 100% visual check after drying, with parts hung individually on racks during the full 12-hour curing cycle instead of placed in bulk baskets. Use a first pass yield tracking system that tags each batch with process parameter logs, so any lot that shows 2% or higher scrap rate at any production step will trigger a full 100% inspection before packaging. This removes the risk of marginal parts slipping through sampling plans, and raises overall production yield from 92% to above 98% for most housing hardware SKUs. **status:** suggested **Author:** Eric Zhao **Date:** 2026-10-03 ### Answer 4 Set up dedicated production cells for housing rated hardware parts that are separated from the general commodity hardware production lines in the supplier’s facility. This eliminates cross contamination where leftover scrap from lower grade steel gets mixed into batches of 304 stainless housing parts, which is a very common hidden root cause of unexpected rust failures. Add inline automated vision inspection stations after each core production step, instead of relying solely on final offline sampling. The vision system can automatically detect micro burrs, plating unevenness, and dimensional deviations as small as 0.05mm at a cycle time of 3 seconds per part, so no defective units move to the next production stage. This also reduces total production cycle time per part by 22%, since rework for out of spec parts is handled immediately instead of being processed at the end of the full production flow. **status:** suggested **Author:** Linda Xu **Date:** 2026-10-03 ### Answer 5 Review all existing housing hardware part drawings to remove unnecessary tight tolerance requirements that add no functional value while raising defect rates. For load bearing mounting brackets, avoid specifying wall thickness below 1.2mm, since thinner sections will deform easily under minor impact during installation, leading to misalignment during final assembly. Add a minimum 0.5° draft angle on all formed part surfaces that are drawn from stamping dies, to eliminate scuff marks that create weak points where rust can start spreading. Remove any sharp internal corners on bracket designs, and replace them with a minimum 0.3mm radius, which reduces stress concentration that causes parts to crack under cyclic temperature load over years of outdoor use. These small design adjustments do not change the part’s fit or function, but they lower production defect rates by nearly 30% and extend the part’s expected service life significantly. **status:** suggested **Author:** Emily Chen **Date:** 2026-10-03 ### Answer 6 For any plastic integrated housing hardware parts such as threaded inserts that are overmolded into the main plastic housing, select gate locations that do not leave weld lines within 5mm of the hardware insert contact surface. Weld lines in these areas create hidden gaps that let moisture seep into the housing, leading to corrosion of the metal insert over time. Design the mold with a 0.02mm press fit interference between the insert cavity and the pre-placed metal hardware, to ensure the plastic material flows fully around every surface of the insert with no trapped air gaps. Add a dedicated insert positioning pin in each mold cavity that locates the hardware part with 0.03mm accuracy, so no insert shifts during the injection cycle, which eliminates the 7% of overmolded parts that usually fail pull out strength testing. This design adjustment also reduces post-mold insert rework completely at mass production. **status:** suggested **Author:** Amy Li **Date:** 2026-10-03 ### Answer 7 Run a full tolerance stack up analysis across the full set of mating hardware and plastic housing components before launching any new part revision. The accumulated tolerance of 3 mating hardware parts that all sit at the upper limit of their bilateral tolerance range can create a total deviation of 0.3mm, which is enough to block 20% of units from fitting correctly during assembly. Document all critical assembly sequence requirements for hardware parts, so suppliers do not ship parts that meet individual drawing specs but fail when assembled together on your production line. Add a pre-production pilot assembly test with 50 sample parts from 3 consecutive production runs, to confirm that fit consistency stays above 99% across different production batches. This eliminates unforeseen assembly line stoppages that can delay full production launch by multiple days. **status:** suggested **Author:** Olivia Chen **Date:** 2026-10-03 ### Answer 8 For CNC machined housing hardware parts such as hinge shafts, use a custom segmented collet fixture instead of a standard three jaw chuck during turning operations, to hold part concentricity within 0.02mm across the full 80mm shaft length. This prevents the 0.1mm runout that causes hinge sticking after 1000 opening cycles in the field. Select a climb milling strategy for all stainless steel part surfaces instead of conventional milling, which creates a smoother surface finish of Ra 0.8 or better, with no micro tool marks that trap moisture and start rust. Avoid secondary centerless grinding steps for high volume shaft parts, since the grinding fluid residue left in part gaps is very hard to remove fully, and will cause hidden corrosion under the plating layer 6 to 12 months after delivery. These machining adjustments cut field failure rates for moving hardware components by more than 40%. **status:** suggested **Author:** Michael Wu **Date:** 2026-10-03 ### Answer 9 For different tiers of housing hardware parts, select material grades that balance performance and total cost of ownership instead of only picking the lowest cost option. For Tier 1 load bearing parts used in coastal high salt fog areas, 316 stainless steel delivers 3 times longer salt spray resistance than 304, with only an 18% higher material cost, which is far cheaper than handling field warranty claims later. For low load internal parts that never see outdoor exposure, use cold rolled steel with powder coating instead of full stainless steel, which cuts material cost by 40% with zero impact to part performance. Replace standard zinc plating with zinc aluminum alloy plating for medium exposure parts, which delivers 5 times longer corrosion resistance than regular zinc plating, with only a 7% increase in per part cost. These targeted material selections avoid over-specifying low risk parts while under-specifying high risk parts, delivering the best possible total cost of ownership across the full 10 year product service life. **status:** suggested **Author:** Kevin Liu **Date:** 2026-10-03 ## Related Resources - [Hardware Manufacturing Q&A](https://www.ok-tool.com/qa/hardware-manufacturing/) - [Hardware Components](https://www.ok-tool.com/products/hardware-components/) - [Hardware Manufacturing](https://www.ok-tool.com/capabilities/hardware-manufacturing/) - [Hardware Manufacturing Guide](https://www.ok-tool.com/manufacturing/hardware/) - [Hardware Manufacturing Buying Guides](https://www.ok-tool.com/buying/hardware/) - [Hardware Tool Handles](https://www.ok-tool.com/injection-molding-for-hardware-tool-handles/) - [Custom Manufacturing](https://www.ok-tool.com/custom-manufacturing/) - [Manufacturing Knowledge Base](https://www.ok-tool.com/knowledge/) - [Hardware & Tool Parts](https://www.ok-tool.com/knowledge/hardware-tool-parts/) ## Structured Data ```json [ { "@context": "https://schema.org", "@type": "QAPage", "mainEntity": { "@type": "Question", "name": "How to verify long term corrosion resistance of industrial hardware parts for housing applications?", "text": "I am responsible for incoming inspection and supplier audits for our line of smart residential access control systems, which uses 12 different industrial hardware parts for housing applications including mounting brackets, latch pins, hinge shafts, and sealing press rings. Last quarter we had 3 separate batch issues: 12% of zinc-plated mounting brackets showed white rust after 4 weeks of outdoor exposure testing, 7% of stainless steel hinge shafts failed the 48-hour salt spray test, and a 0.2mm tolerance deviation on the mounting screw bosses caused 18% of units to fail final assembly at our contract plant. Right now we are updating our 2026 supplier qualification and incoming inspection standards for these parts, but I can’t find clear, application-specific benchmarks that separate acceptable commercial grade hardware from parts certified for 10-year outdoor housing use. I need to know what hard, testable criteria we should add to our audit checklists to avoid repeating these costly rework and field failure risks this year.", "answerCount": 9, "upvoteCount": 13, "datePublished": "2026-10-03T02:42:07Z", "dateModified": "2026-10-03T02:47:22Z", "author": { "@type": "Person", "name": "Anonymous", "url": "https://www.ok-tool.com/qa/verify-corrosion-resistance-industrial-housing-hardware.html" } ,"acceptedAnswer": { "@type": "Answer", "text": "The core difference between general industrial hardware and parts qualified for housing applications is that most off-the-shelf components are designed for static indoor equipment use, with no consideration for the cyclic temperature, humidity, UV exposure, and minor impact loads that housing hardware sees over a 10-year service life. The root cause of your recent batch failures is that your existing inspection standards only check for dimensional accuracy and basic surface finish, not application-specific performance markers that separate commodity parts from housing-rated components. First, sort all your 12 housing hardware parts by load and exposure tier, to avoid over-testing low-risk parts while tightening controls for high-risk units. Tier 1 parts (hinge shafts, load-bearing mounting brackets) see direct shear loads and full outdoor exposure; Tier 2 parts (latch pins, sealing rings) are semi-exposed with no critical safety load; Tier 3 parts (decorative screw covers, internal alignment pins) sit fully inside the housing with zero outdoor contact. For Tier 1 parts, add 3 mandatory pass/fail checks to your incoming inspection workflow : 120-hour neutral salt spray test with no red rust, cyclic temperature shock testing from -30°C to 70°C for 50 cycles with no dimensional deformation, and shear load testing to 150% of rated working load with no permanent bending. Tier 2 parts can follow the 48-hour salt spray requirement you already reference, while Tier 3 parts only need basic dimensional verification. For tolerance mismatch issues with mating plastic components, the core gap is that most hardware suppliers use general ISO 2768-mk tolerance grades that do not align with the looser, controlled shrinkage tolerances of injection molded plastic housing parts. All housing hardware dimensions that mate directly to plastic should be specified with unilateral tolerances instead of bilateral tolerances : for example, instead of listing a 6mm mounting boss diameter as 6 ±0.1mm, set it as 6.0 / +0.05mm, so the hardware never exceeds the maximum dimension the pre-designed plastic socket can accommodate. This eliminates 90% of unforeseen assembly fit issues without requiring costly secondary machining adjustments. For supplier audit qualification, add two process checkpoints that are rarely documented on formal inspection reports. The first is verifying that the plating line for zinc parts uses a trivalent chromate passivation layer of minimum 8μm thickness, instead of the standard 3μm layer used for commodity hardware. The second is confirming that all stainless steel 304 parts for housing use go through a post-machining passivation dip to remove free iron particles left from cutting tools, which is the top root cause of unexplained early rust on machined stainless parts. You can test this on your incoming lots with a 5% copper sulfate spot test that shows no copper deposition for 2 minutes , which takes less than 30 seconds per part and requires no lab equipment. This set of criteria cuts average incoming defect rates for housing hardware by 27% for similar projects, and eliminates almost all field rust reports for 10-year service life requirements.", "upvoteCount": 13, "url": "https://www.ok-tool.com/qa/verify-corrosion-resistance-industrial-housing-hardware.html#acceptedAnswer", "datePublished": "2026-10-03T04:06:56Z", "author": {"@type": "Person","name": "Daniel Yang","url": "https://www.ok-tool.com/team/daniel.html"} } ,"suggestedAnswer": [ { "@type": "Answer", "text": "For stamping dies used to produce high volume housing mounting brackets, select A2 tool steel hardened to 58-60 HRC for all critical forming edges, instead of the cheaper D2 steel that many low cost suppliers use. A2 offers better impact resistance against the 1.5mm thick cold rolled steel blanks used for load bearing brackets, and will hold consistent flatness across more than 250,000 strokes without edge chipping. Schedule a preventive maintenance interval every 80,000 strokes to polish forming edges and reset die clearances, which prevents burrs and dimensional drift that often slip through basic incoming dimensional checks. For progressive stamping lines, track the die wear rate for each critical dimension, and add a mid-run sample check every 2 hours for tolerance-critical dimensions, so any deviation can be corrected before a full batch of out of spec parts is produced. This extended die life also reduces per part cost by 12-15% at volumes above 50,000 units per year.", "upvoteCount": 0, "url": "https://www.ok-tool.com/qa/verify-corrosion-resistance-industrial-housing-hardware.html#suggestedAnswer-2", "datePublished": "2026-10-03T03:54:22Z", "author": {"@type": "Person","name": "Sophia Wang","url": "https://www.ok-tool.com/team/sophia.html"} } , { "@type": "Answer", "text": "Map the full production flow for each housing hardware part to identify hidden yield bottlenecks that create uninspected defective parts. For zinc plated brackets, the top hidden bottleneck is the post-plating drying step, where parts stacked too densely will trap residual plating solution that causes white rust to appear weeks after delivery, even if parts pass initial salt spray testing. Implement a 100% visual check after drying, with parts hung individually on racks during the full 12-hour curing cycle instead of placed in bulk baskets. Use a first pass yield tracking system that tags each batch with process parameter logs, so any lot that shows 2% or higher scrap rate at any production step will trigger a full 100% inspection before packaging. This removes the risk of marginal parts slipping through sampling plans, and raises overall production yield from 92% to above 98% for most housing hardware SKUs.", "upvoteCount": 0, "url": "https://www.ok-tool.com/qa/verify-corrosion-resistance-industrial-housing-hardware.html#suggestedAnswer-3", "datePublished": "2026-10-03T03:44:14Z", "author": {"@type": "Person","name": "Eric Zhao","url": "https://www.ok-tool.com/team/eric.html"} } , { "@type": "Answer", "text": "Set up dedicated production cells for housing rated hardware parts that are separated from the general commodity hardware production lines in the supplier’s facility. This eliminates cross contamination where leftover scrap from lower grade steel gets mixed into batches of 304 stainless housing parts, which is a very common hidden root cause of unexpected rust failures. Add inline automated vision inspection stations after each core production step, instead of relying solely on final offline sampling. The vision system can automatically detect micro burrs, plating unevenness, and dimensional deviations as small as 0.05mm at a cycle time of 3 seconds per part, so no defective units move to the next production stage. This also reduces total production cycle time per part by 22%, since rework for out of spec parts is handled immediately instead of being processed at the end of the full production flow.", "upvoteCount": 0, "url": "https://www.ok-tool.com/qa/verify-corrosion-resistance-industrial-housing-hardware.html#suggestedAnswer-4", "datePublished": "2026-10-03T03:37:25Z", "author": {"@type": "Person","name": "Linda Xu","url": "https://www.ok-tool.com/team/linda.html"} } , { "@type": "Answer", "text": "Review all existing housing hardware part drawings to remove unnecessary tight tolerance requirements that add no functional value while raising defect rates. For load bearing mounting brackets, avoid specifying wall thickness below 1.2mm, since thinner sections will deform easily under minor impact during installation, leading to misalignment during final assembly. Add a minimum 0.5° draft angle on all formed part surfaces that are drawn from stamping dies, to eliminate scuff marks that create weak points where rust can start spreading. Remove any sharp internal corners on bracket designs, and replace them with a minimum 0.3mm radius, which reduces stress concentration that causes parts to crack under cyclic temperature load over years of outdoor use. These small design adjustments do not change the part’s fit or function, but they lower production defect rates by nearly 30% and extend the part’s expected service life significantly.", "upvoteCount": 0, "url": "https://www.ok-tool.com/qa/verify-corrosion-resistance-industrial-housing-hardware.html#suggestedAnswer-5", "datePublished": "2026-10-03T03:26:44Z", "author": {"@type": "Person","name": "Emily Chen","url": "https://www.ok-tool.com/team/emily.html"} } , { "@type": "Answer", "text": "For any plastic integrated housing hardware parts such as threaded inserts that are overmolded into the main plastic housing, select gate locations that do not leave weld lines within 5mm of the hardware insert contact surface. Weld lines in these areas create hidden gaps that let moisture seep into the housing, leading to corrosion of the metal insert over time. Design the mold with a 0.02mm press fit interference between the insert cavity and the pre-placed metal hardware, to ensure the plastic material flows fully around every surface of the insert with no trapped air gaps. Add a dedicated insert positioning pin in each mold cavity that locates the hardware part with 0.03mm accuracy, so no insert shifts during the injection cycle, which eliminates the 7% of overmolded parts that usually fail pull out strength testing. This design adjustment also reduces post-mold insert rework completely at mass production.", "upvoteCount": 0, "url": "https://www.ok-tool.com/qa/verify-corrosion-resistance-industrial-housing-hardware.html#suggestedAnswer-6", "datePublished": "2026-10-03T03:18:07Z", "author": {"@type": "Person","name": "Amy Li","url": "https://www.ok-tool.com/team/amy.html"} } , { "@type": "Answer", "text": "Run a full tolerance stack up analysis across the full set of mating hardware and plastic housing components before launching any new part revision. The accumulated tolerance of 3 mating hardware parts that all sit at the upper limit of their bilateral tolerance range can create a total deviation of 0.3mm, which is enough to block 20% of units from fitting correctly during assembly. Document all critical assembly sequence requirements for hardware parts, so suppliers do not ship parts that meet individual drawing specs but fail when assembled together on your production line. Add a pre-production pilot assembly test with 50 sample parts from 3 consecutive production runs, to confirm that fit consistency stays above 99% across different production batches. This eliminates unforeseen assembly line stoppages that can delay full production launch by multiple days.", "upvoteCount": 0, "url": "https://www.ok-tool.com/qa/verify-corrosion-resistance-industrial-housing-hardware.html#suggestedAnswer-7", "datePublished": "2026-10-03T03:10:04Z", "author": {"@type": "Person","name": "Olivia Chen","url": "https://www.ok-tool.com/team/olivia.html"} } , { "@type": "Answer", "text": "For CNC machined housing hardware parts such as hinge shafts, use a custom segmented collet fixture instead of a standard three jaw chuck during turning operations, to hold part concentricity within 0.02mm across the full 80mm shaft length. This prevents the 0.1mm runout that causes hinge sticking after 1000 opening cycles in the field. Select a climb milling strategy for all stainless steel part surfaces instead of conventional milling, which creates a smoother surface finish of Ra 0.8 or better, with no micro tool marks that trap moisture and start rust. Avoid secondary centerless grinding steps for high volume shaft parts, since the grinding fluid residue left in part gaps is very hard to remove fully, and will cause hidden corrosion under the plating layer 6 to 12 months after delivery. These machining adjustments cut field failure rates for moving hardware components by more than 40%.", "upvoteCount": 0, "url": "https://www.ok-tool.com/qa/verify-corrosion-resistance-industrial-housing-hardware.html#suggestedAnswer-8", "datePublished": "2026-10-03T03:06:54Z", "author": {"@type": "Person","name": "Michael Wu","url": "https://www.ok-tool.com/team/michael.html"} } , { "@type": "Answer", "text": "For different tiers of housing hardware parts, select material grades that balance performance and total cost of ownership instead of only picking the lowest cost option. For Tier 1 load bearing parts used in coastal high salt fog areas, 316 stainless steel delivers 3 times longer salt spray resistance than 304, with only an 18% higher material cost, which is far cheaper than handling field warranty claims later. For low load internal parts that never see outdoor exposure, use cold rolled steel with powder coating instead of full stainless steel, which cuts material cost by 40% with zero impact to part performance. Replace standard zinc plating with zinc aluminum alloy plating for medium exposure parts, which delivers 5 times longer corrosion resistance than regular zinc plating, with only a 7% increase in per part cost. These targeted material selections avoid over-specifying low risk parts while under-specifying high risk parts, delivering the best possible total cost of ownership across the full 10 year product service life.", "upvoteCount": 0, "url": "https://www.ok-tool.com/qa/verify-corrosion-resistance-industrial-housing-hardware.html#suggestedAnswer-9", "datePublished": "2026-10-03T02:47:22Z", "author": {"@type": "Person","name": "Kevin Liu","url": "https://www.ok-tool.com/team/kevin.html"} } ] } }, { "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ {"@type": "ListItem", "position": 1, "name": "Home", "item": "https://www.ok-tool.com/"},{"@type": "ListItem", "position": 2, "name": "Q&A", "item": "https://www.ok-tool.com/qa/"},{"@type": "ListItem", "position": 3, "name": "Hardware Manufacturing Q&A", "item": "https://www.ok-tool.com/qa/hardware-manufacturing/"} ,{"@type": "ListItem", "position": 4, "name": "How to verify long term corrosion resistance of industrial hardware parts for housing applications?"} ] } ] ```