Abstract
AbstractMetal articles can be given a strippable protective coating by dipping in cold concentrated rubber latex (preferably vulcanized) in which a corrosion‐inhibitor, compatible with the latex, is incorporated. Sodium benzoate is effective for this purpose for steel and certain other metals under adverse conditions of storage or transport. The sodium salts of certain other carboxylic acids may also be used. The best all‐round protection (embracing cast iron, solder, tinplate and non‐ferrous metals except cadmium and magnesium) is afforded by sodium benzoate with a smaller proportion of sodium nitrite.Protective films which, however, are hard and generally non‐strippable, may also be obtained by the addition of benzoate to emulsions of other organic high polymers such as polyvinyl acetate, polyvinyl chloride and copolymers.
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