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ENHANCED DYE ADSORPTION FROM
NEW TRIVALENT CHROMIUM COATING The Aldoa Company (Detroit, MI), a leading research, developer and manufacturer of advanced, environmental-friendly chemicals for the plating industry, has announced the introduction of a new, clear passivation coating for parts having electroplated zinc deposits. Designated Aldokote TCL, the formulation is a two-part system, based on the trivalent chromium salts (replacing hazardous hexavalent-based compounds) which gives a clear chromate with excellent adsorption performance for organic dyes of various colors. Further, Aldokote TCL is used at room temperature, so the working solution and parameters are easy to maintain. The bath is suitable for both rack and barrel applications. (CONTINUED) |
REPLACING CADMIUM…ALTERNATIVE PLATING TAKING (THE) CHARGE
As company and industry-wide restrictions plus government bans take effect, one chemical firm has come to the forefront of research and development of a cost efficient, quality efficient cadmium plating substitute. During World War II, with most of the cadmium and cadmium plating going towards the war effort, the plating industry investigated alternatives—most notably, tin zinc compounds—that would provide suitable finishes and corrosion protection. By the end of war, little had been accomplished in this search, and with the return of a plentiful supply of cadmium, it was once again the coating of choice, providing an excellent balance of rust prevention, cost effectiveness and finish appearance. (CONTINUED) |
NEW TRIVALENT CHROMIUM CONVERSION COATING FOR ZINC, ZINC-NICKEL PLATING
With the current restrictions on the use of hexavalent chromium right around the corner, all chemical companies supplying the plating industry are scurrying to find suitable replacements. All, that is, except for the Aldoa Company (Detroit, MI) which has pioneered environmentally friendly processes such as non-cyanide zinc and cadmium processes and Novalyte ZNA, a zinc-nickel plating that is one of the most widely used substitutes for cadmium plating. Now, a new trivalent chromium salts conversion coating for electroplated acid zinc deposits has been introduced. Called Aldokote ZN-3, the formulation is a two component solution that produces a bright and highly corrosion-resistant clear to slightly iridescent conversion coating, ideal for fasteners, supports and brackets. The coating formulation provides an easy to prepare, use and maintain bath that requires no additional steps or secondary top coats. Under mild agitation (either mechanical or solution circulation) and an immersion time of between 30 and 60 seconds, Aldokote ZN-3 can provide a protection of more than 120 hours of neutral salt spray testing against the appearance of white corrosion, easily surpassing typical automotive and other industry specifications. (CONTINUED)
With the current restrictions on the use of hexavalent chromium right around the corner, all chemical companies supplying the plating industry are scurrying to find suitable replacements. All, that is, except for the Aldoa Company (Detroit, MI) which has pioneered environmentally friendly processes such as non-cyanide zinc and cadmium processes and Novalyte ZNA, a zinc-nickel plating that is one of the most widely used substitutes for cadmium plating. Now, a new trivalent chromium salts conversion coating for electroplated acid zinc deposits has been introduced. Called Aldokote ZN-3, the formulation is a two component solution that produces a bright and highly corrosion-resistant clear to slightly iridescent conversion coating, ideal for fasteners, supports and brackets. The coating formulation provides an easy to prepare, use and maintain bath that requires no additional steps or secondary top coats. Under mild agitation (either mechanical or solution circulation) and an immersion time of between 30 and 60 seconds, Aldokote ZN-3 can provide a protection of more than 120 hours of neutral salt spray testing against the appearance of white corrosion, easily surpassing typical automotive and other industry specifications. (CONTINUED)
ALDOA COMPANY
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phone |
TEL: 313-273-5705 FAX: 313-273-0310 |
address |
12727 Westwood Street Detroit, MI 48223 |
