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Columbia Receives GMW 4700 ZNNI Type B Chemistry Approval
Columbia Receives GMW 4700 ZNNI Type B Chemistry Approval
June 25, 2020
Columbia Chemical is pleased to announce the approval of our zinc nickel black process to the General Motors (GM) approved source list (MATSPC) in Korea under the GMW 4700 ZNNI Type B specification. The GMW 4700 ZNNI Type B specification covers the basic requirements for barrel or rack electrodeposited zinc alloy over a ferrous substrate. Various alloy platings with supplemental treatments are covered by this specification. The minimum performance spec requirements include: 240 hours to white corrosion, 1,000 hours to red corrosion and 61 cycles of the cyclic test.
Columbia Chemical’s OEM experts remain on the cutting edge of automotive industry regulations and take pride in working closely with automotive and OEMs to ensure development of plating processes that exceed requirements in the areas of corrosion protection, surface lubricity, abrasion resistance, color and brightness.
Columbia has successfully qualified and received formal approval on numerous global specifications for GM and additional OEMs. Being well represented on material source lists means Columbia Chemical’s automotive customers have a trusted chemistry supplier source to finish the components they plate for the auto industry.
In addition, Columbia Chemical has developed a tiered quality assurance audit process known as the C.A.R (Columbia Approved Resource) program. C.A.R approved applicators are audited regularly to ensure they are meeting key components of the OEM specifications to help ensure quality and peace of mind for the OEMs. The designation of a CAR approval reflects a dedication to high quality and constant improvement.More information on Columbia Chemical’s global approved specifications or the C.A.R program can be found on our website at www.columbiachemical.com.