CONVERSION COATING FOR CHROMIUM
ROCK ISLAND ARSENAL IL
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Selected chemicals in water solution were used electrolytically in an effort to produce an oxide conversion coating upon electrodeposited chromium. Some materials and solution combinations produced thin, colored, iridescent films at the anode or cathode and sometimes at both electrodes. Cr2O3 films were obtained in whatAPPEARS TO BE THE HYDROUS FORM AT THE ANODE. Such films could be produced as relatively thick gels. Unfortunately, these gels have no bond to the basis Cr and upon removal from solution, dry to a loosely adherent powder. No satisfactory method was found for producing Cr2O3 supplementary coatings on Cr surfaces using aqueous solution techniques.
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