Greenkote’s Thermo-Chemical Surface Modification Process Lifts the Environmental Bar

The processes and coatings are totally free of acids, chlorides, cyanides, trivalent and hexavalent chromium, cadmium, heavy metals, volatile organic chemicals and other hazardous air pollutants.

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Greenkote’s thermo-chemical surface modification process diffuses a zinc-based coating into the surface of metal parts through a patented dry thermal process. The processes and coatings are totally free of acids, chlorides, cyanides, trivalent and hexavalent chromium, cadmium, heavy metals, volatile organic chemicals and other hazardous air pollutants, most of which are the targets of current or upcoming stringent regulations.

The technology is designed to reduce waste almost entirely. Even the waters used for post-process rinsing are recycled, and any small amounts of residual zinc oxide dust can be reclaimed. The green and clean Greenkote process therefore helps save on costs, the company says, since the elimination of hazardous waste eliminates the expenses of waste clean-up, disposal and reporting.

The Greenkote process offers a number of critical advantages, depending on the application. Using no acids, important issues such as hydrogen embrittlement are avoided, while the process offers high corrosion resistance, paint adhesion and coating consistency. When coating threads, Greenkote says neither internal nor external surfaces need to be reworked.

The process minimizes regulatory costs and issues, since the elimination of hazardous waste eliminates the expenses of high water consumption, waste cleanup, disposal and reporting.

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