Composition and method for blackening metal articles
作者： Weaver Roger , Schaffstall Eugene
DOI:
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摘要: A COMPOSITION FOR PRODUCING BLACK OXIDE COATINGS ON FERROUS METALS COMPRISING LIQUID MIXTURE OF SODIUM HYDROXIDE, NITRATE, NITRITE, AND WATER IS IMPROVED BY THE ADDITION TRIETHANOLAMINE OR OTHER IRON SEQUESTRANTS.
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