chrome / cadmium plating replacement
Bring in the replacements
At Praxair Surface Technologies, our broad portfolio of coating materials and application technologies ensures you get equivalent or better performance compared to hexavalent chrome- and cadmium-containing platings without associated environmental regulations and employee hazards.
Whatever the problem, we have a coating solution for it. Below are some of the REACH-compliant options available as replacement for hexavalent chrome and cadmium coatings and platings. For us, each problem is unique, requiring a unique answer. Rather than forcing a standard solution, we’re interested in making more possible. That’s why we’ll work directly with you to understand your unique challenge and find the solution that gets more performance from your parts and equipment.
Our SermaLoy™ J CF chrome-free diffusion coating offers protection against hot corrosion and oxidation attack in the combustor and turbine sections. Compatible with austenitic stainless steel and nickel- and cobalt-based superalloys, the diffusion SermaLoy J CF treatment can be tailored to each alloy and application. With a relatively low diffusion temperature, the post-coating heat treatment process is eliminated, which allows components to be refurbished without risking damage to brazed joints.
SermaLoy™ J CF Chrome-Free Diffusion Aluminid Coating (147 KB)
Looking for unsurpassed protection against aqueous corrosion and heat scaling, as well as erosion and abrasion resistance? Our SermeTel™ CF chrome-free coatings systems offer that and more. SermeTel™ 2F-1 CF is designed to provide protection from severely corrosive conditions. Suitable applications include bearing supports, cases, shafts, compressor blades and vanes. SermeTel™ 6F-1 CF provides corrosion protection in high-temperature conditions and meets stringent OEM gas turbine specifications. SermeTel™ 5380 CF offers advanced corrosion protection with a smoother surface finish that improves efficiency for compressor components.
Thermal Spray Coatings
Tungsten carbide-cobalt (WC-Co) and tungsten carbide-cobalt chromium (WC-CoCr) coatings offer extraordinary hardness, wear protection and comparable corrosion protection to that of hard chrome plating for hard face coating or dimensional restoration of many airframe components such as landing gear, flight actuators, thrust reversers and tracks. And, select your level of protection based on the thermal spray application process that is right for you: detonation gun (D-Gun) or Super D-Gun™, high-velocity oxy fuel (HVOF) or plasma.
For thermal barrier protection, our Zircoat™ ytrria-stabilized zirconia coating outperforms low-density thermal barrier coatings (TBCs) with its superior thermal shock resistance and virtually unlimited thickness capability. As combustion temperatures increase to improve engine efficiency, you need additional thermal protection that low-density TBCs can’t provide. Get four times the thickness and improve thermal shock resistance with a Zircoat coating.
As a proven cadmium plating replacement, zinc-nickel plating (ZnNi) offers excellent sacrificial corrosion protection for steel and very good protection against white rust formation. The coating's high hardness combined with low hydrogen embrittlement makes it a viable replacement solution.