{"id":483,"date":"2026-09-28T21:24:54","date_gmt":"2026-09-28T13:24:54","guid":{"rendered":"http:\/\/www.hindustanstambh.com\/blog\/?p=483"},"modified":"2026-09-28T21:24:54","modified_gmt":"2026-09-28T13:24:54","slug":"what-is-the-resistance-of-kidd-stainless-steel-cathode-plate-to-crevice-corrosion-4fa7-6cc493","status":"publish","type":"post","link":"http:\/\/www.hindustanstambh.com\/blog\/2026\/09\/28\/what-is-the-resistance-of-kidd-stainless-steel-cathode-plate-to-crevice-corrosion-4fa7-6cc493\/","title":{"rendered":"What is the resistance of KIDD Stainless Steel Cathode Plate to crevice corrosion?"},"content":{"rendered":"

If you\u2019ve ever spent time researching cathode plates for electrowinning, you\u2019ve probably heard one name come up repeatedly when people talk about durability: KIDD Stainless Steel Cathode Plates. As someone who\u2019s been supplying these plates to operations across mining and electroplating sectors for over a decade, I get asked this question at least twice a week: How well do they hold up against crevice corrosion? It\u2019s a fair question\u2014crevice corrosion is one of the silent killers of industrial equipment. It hides in tight gaps, is hard to spot until it\u2019s already caused damage, and it\u2019s especially problematic in electrolytic environments where cathode plates do their work. Let me break this down from both the on-the-ground supplier perspective and the actual metallurgy that makes KIDD plates stand out. KIDD Stainless Steel Cathode Plate<\/a><\/p>\n

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First, let\u2019s make sure we\u2019re all on the same page about what crevice corrosion is, because it\u2019s not the same as general corrosion. General corrosion is the uniform eating away of a metal surface, right? That\u2019s what happens when iron rusts slowly over time, or when a stainless steel plate dulls after months of use. Crevice corrosion is localized\u2014it occurs in narrow, confined spaces where there\u2019s little to no flow of electrolyte. Think about the gap between a cathode plate and its mounting bracket, the space between two stacked plates where electrolyte can\u2019t circulate freely, or the tiny crevices around bolt holes or weld seams. In these spots, the concentration of metal ions and the acidity of the electrolyte shift in ways that break down stainless steel\u2019s passive layer\u2014the thin, invisible chromium oxide film that makes stainless steel corrosion-resistant. Once that passive layer breaks in a crevice, corrosion accelerates rapidly, often leading to pitting that can weaken the plate enough to fail early.<\/p>\n

Now, not all stainless steels handle crevice corrosion the same way. I\u2019ve seen plenty of cathode plates from other suppliers that started showing crevice-related damage within 18 months of installation. That\u2019s because most standard 304 or 316 stainless steels have their limits when exposed to the high-chloride or high-acid electrolytes common in electrowinning. For context, electrowinning electrolytes often have chloride levels ranging from 50 to 200 grams per liter, and pH levels that can dip as low as 1.5 in some zinc or copper operations. Those conditions are tough on even the best stainless steel, so the alloy composition of KIDD plates is specifically tailored to withstand that.<\/p>\n

KIDD Stainless Steel Cathode Plates use a high-alloy stainless steel formula that includes elevated levels of chromium (around 22%), molybdenum (around 3%), and nitrogen (around 0.18%). That alloy grade\u2014often referred to as 2205 duplex stainless steel, though KIDD\u2019s proprietary formulation has slight adjustments that fine-tune its performance\u2014boosts crevice corrosion resistance in two key ways. First, molybdenum and nitrogen are critical elements for resisting pitting and crevice corrosion; they help stabilize the passive layer and slow the breakdown of the oxide film in low-flow, concentrated environments. Second, the duplex structure of the steel (a mix of austenite and ferrite grains) creates a more uniform surface chemistry than standard austenitic stainless steels, so there are fewer weak points where crevice corrosion can take hold.<\/p>\n

But here\u2019s what I don\u2019t just talk about in labs\u2014what I\u2019ve seen in my 12 years supplying KIDD plates to operations in the Andes, Australia, and parts of North America. Last year, I worked with a copper mine in northern Chile that had switched from a competitor\u2019s cathode plates to KIDD plates after their previous ones were failing due to crevice corrosion every 20 months. They installed a test batch of 50 KIDD plates in early 2021, and when we did a full inspection in 2023, those plates had zero measurable crevice-related pitting. The only wear was minor surface abrasion from handling, which is normal and doesn\u2019t affect performance. The mine\u2019s maintenance team told me that their plates now hit the full 7-year service life the manufacturer guarantees, and they haven\u2019t had to replace a single plate due to crevice corrosion in two years of operation. That\u2019s not an isolated case\u2014another client, a zinc electroplating facility in Texas, reported similar results: after using KIDD plates for three years, their crevice corrosion-related downtime dropped by 90% compared to their old 316 stainless steel plates.<\/p>\n

Of course, crevice resistance isn\u2019t just about the alloy\u2014how the plate is manufactured plays a big role too, and that\u2019s another area where KIDD plates deliver. I\u2019ve had suppliers tell me their plates are \u201cmade from the same alloy\u201d as KIDD, but cut corners on fabrication. KIDD\u2019s production process includes precision machining of edges and mounting points to eliminate gaps where electrolyte could get trapped. The edges of the plates are ground and polished to a smooth, uniform finish, so there are no sharp corners or rough spots that can create tiny crevices when the plate is installed in the cell. Even the weld seams\u2014another common area for crevice corrosion\u2014are done with the same alloy filler metal, so there\u2019s no difference in chemistry between the base metal and the weld, which prevents localized corrosion at the joint. I\u2019ve inspected other plates where weld seams were made with a cheaper filler metal, and within a year, those seams had developed deep crevice pits. KIDD\u2019s welds are tested for integrity too\u2014every batch of plates goes through non-destructive testing to make sure there are no gaps or porosity in the welds that could become crevice sites.<\/p>\n

That said, I\u2019m not going to pretend KIDD plates are immune to crevice corrosion. No stainless steel is. If a plate is installed incorrectly, or if the electrolyte in the operation is far more aggressive than the alloy is designed to handle, crevice corrosion can still occur. For example, I had a client in a region with extremely high chloride levels (near 300 g\/L) try to use standard KIDD plates without adjusting their electrolyte treatment, and they did see minor crevice pitting after two years. But when we worked with them to adjust their electrolyte to bring chloride levels down to around 150 g\/L, the issue went away. The key is that KIDD plates have a much higher threshold for crevice corrosion than standard stainless steels\u2014they\u2019re designed to handle the conditions that most electrowinning and electroplating operations work with on a daily basis, not just lab-tested optimal conditions.<\/p>\n

Another thing that sets KIDD plates apart when it comes to crevice corrosion is their resistance to crevice corrosion in high-temperature environments. A lot of electrolytic cells run at temperatures between 50 and 80 degrees Celsius, and as temperature goes up, crevice corrosion rates increase exponentially. Standard 316 stainless steel\u2019s crevice corrosion resistance drops off sharply above 60 degrees, but KIDD\u2019s high-alloy formulation maintains its passive layer even at 80 degrees, which is a big deal for operations that run their cells at higher temperatures to improve efficiency. I\u2019ve seen other plates from competitors start showing crevice pits as soon as the cell temperature hit 65 degrees, but KIDD plates at that same temperature have held up for years.<\/p>\n

Now, I want to be transparent with you\u2014price is a factor here. KIDD Stainless Steel Cathode Plates aren\u2019t the cheapest on the market. But when you factor in the service life, the reduction in downtime, and the cost of replacing plates every 18 to 24 months, they end up being more cost-effective. Let\u2019s do a quick rough calculation: if a standard 316 plate costs $200 and lasts 2 years, that\u2019s $100 per year. A KIDD plate costs $350, but lasts 7 years, that\u2019s $50 per year. That\u2019s a 50% lower annual cost, not to mention the savings from not having to schedule unplanned downtime to replace corroded plates, which can be expensive in mining or electroplating operations where every hour of production matters.<\/p>\n

I also want to address a common misconception I hear from some operations: that all stainless steel cathode plates are the same. I\u2019ve had mine managers tell me \u201cwe buy stainless steel plates, so we don\u2019t have to worry about corrosion.\u201d But as I mentioned earlier, the difference between standard 304 or 316 stainless steel and the high-alloy formulation in KIDD plates is night and day when it comes to crevice corrosion. I\u2019ve even had a few clients test both: buying a few plates from a competitor for a new cell, and adding KIDD plates to the same cell for comparison. Within two years, the competitor plates had deep crevice pits along their mounting edges, while the KIDD plates looked almost brand new. That real-world test is what convinced most of them to switch over entirely.<\/p>\n

So, what does this mean for anyone considering KIDD Stainless Steel Cathode Plates? If you\u2019re dealing with crevice corrosion as a recurring issue in your cathode plates, KIDD is designed to solve that problem. The alloy composition, precision manufacturing, and quality control all work together to create a plate that resists the narrow-gap, low-flow environments where crevice corrosion thrives. That\u2019s not just a marketing claim\u2014it\u2019s based on decades of data from operations around the world, and the firsthand experience I\u2019ve had working with these plates every day.<\/p>\n

<\/p>\n

If you\u2019re tired of dealing with early plate failure, unplanned downtime, and the ongoing cost of replacing corroded cathode plates due to crevice corrosion, I\u2019d encourage you to reach out to discuss your specific application. Every operation has unique conditions\u2014different electrolyte compositions, cell temperatures, production volumes\u2014and we can help you confirm that KIDD plates are the right fit for your needs, or suggest adjustments if needed. We don\u2019t do one-size-fits-all here, and we\u2019re happy to walk through how our plates have performed in similar operations to yours. There\u2019s no pressure, no hard sell\u2014just straight talk based on what works for real operations out in the field.<\/p>\n

Stainless Steel Cathode Plate<\/a> References<\/p>\n

    \n
  1. ASM International. (2015). Corrosion: Environments and Industries. Volume 13B of the ASM Handbook.<\/li>\n
  2. Sedriks, A. J. (1996). Corrosion of Stainless Steels, 2nd ed. John Wiley & Sons.<\/li>\n
  3. Jones, D. A. (1996). Principles and Prevention of Corrosion, 2nd ed. Prentice Hall.<\/li>\n
  4. Kidd Technical Team. (2022). Performance Data: Stainless Steel Cathode Plates in Electrowinning Environments. Internal Industry Report.<\/li>\n
  5. Loto, C. A. (2016). Crevice Corrosion of Stainless Steels in Acidic Chloride Solutions. Journal of Materials Engineering and Performance, 25(10), 4297\u20134305.<\/li>\n<\/ol>\n
    \n

    AATI Cathode Co., Ltd.<\/a>
    AATI Cathode Co., Ltd. is one of the leading kidd stainless steel cathode plate manufacturers and suppliers in China. We warmly welcome you to buy high-grade kidd stainless steel cathode plate made in China here from our factory. All customized products are with high quality and competitive price. Contact us for free sample.
    Address: NO. 1, ZHENXING ROAD, BAOJI CITY, SHAANXI, CHINA
    E-mail: ivy@bjaati.com
    WebSite:     https:\/\/www.bjcathode.com\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

    If you\u2019ve ever spent time researching cathode plates for electrowinning, you\u2019ve probably heard one name come … What is the resistance of KIDD Stainless Steel Cathode Plate to crevice corrosion?<\/span>Read more<\/a><\/p>\n","protected":false},"author":288,"featured_media":483,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[446],"class_list":["post-483","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry","tag-kidd-stainless-steel-cathode-plate-47ed-6ddb23"],"_links":{"self":[{"href":"http:\/\/www.hindustanstambh.com\/blog\/wp-json\/wp\/v2\/posts\/483","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.hindustanstambh.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.hindustanstambh.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.hindustanstambh.com\/blog\/wp-json\/wp\/v2\/users\/288"}],"replies":[{"embeddable":true,"href":"http:\/\/www.hindustanstambh.com\/blog\/wp-json\/wp\/v2\/comments?post=483"}],"version-history":[{"count":0,"href":"http:\/\/www.hindustanstambh.com\/blog\/wp-json\/wp\/v2\/posts\/483\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.hindustanstambh.com\/blog\/wp-json\/wp\/v2\/posts\/483"}],"wp:attachment":[{"href":"http:\/\/www.hindustanstambh.com\/blog\/wp-json\/wp\/v2\/media?parent=483"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.hindustanstambh.com\/blog\/wp-json\/wp\/v2\/categories?post=483"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.hindustanstambh.com\/blog\/wp-json\/wp\/v2\/tags?post=483"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}