Columbia Chemical Receives GMW 4700 Approval
Trivecta Ni-Z Black 70 with Trivecta Black Sealer 350 approved under the GMW 4700 Type B, BL specification
Columbia Chemical has been granted zinc nickel approval by General Motors for Trivecta Ni-Z Black 70 with Trivecta Black Sealer 350 under the GMW 4700 Type B, BL specification.
Columbia Chemical’s unique black all trivalent passivating conversion coating for electroplated zinc nickel alloy is now part of GM’s limited list of approved finishers for zinc nickel. Ni-Z Black 70 with Trivecta Black Sealer 350 meets all of the GMW 4700 TYPE B, BL specification minimum requirements including 240 hours to white corrosion, 1,000 hours to red corrosion and 61 cycles of the cyclic test.
Columbia Chemical Corporation is one of the world’s largest manufacturers of zinc and zinc alloy plating additives. For more information, contact Columbia Chemical at 330-225-3200, or www.columbiachemical.com
Related Content
-
Trivalent Chrome Overview
As the finishing industry begins to move away from the use of hexavalent chromium to trivalent chromium, what factors should finishers consider as they make new investments? Mark Schario, chief technology officer for Columbia Chemical offers a helpful overview of this complicated topic.
-
Troubleshooting Alkaline Zinc
One of the most common problems that can arise when plating with alkaline zinc is an imbalance of brightener in the solution. In this helpful Ask the Expert article, Chad Murphy of Columbia Chemical discusses how different zinc metal concentrations and brightener concentrations can impact efficiency.
-
Advantages to Pumped Eductor Agitation
Not all agitation methods are created equally. Pumped agitation with eductor nozzles can improve process tanks and quickly show a reduction in operating costs while keeping staff safe, following environmental legislation and preventing pollution.
