Abstract
An analysis is made and the results are presented of investigations of the features of inhibitor protection of steel from corrosion and hydrogen impregnation and also of cleaning of industrial equipment in solutions of sulfuric and sulfamic acids. Acid cleaning of equipment (thermal power, chemical, petroleum refining, and petro-chemical industries, etc.) with hydrochloric acid is the most widely used. The data of plant investigations indicate the high protective effectiveness of inhibited sulfamic acid solutions; the best is an acid solution with additions of KhOSP-10 inhibitor. The sulfamic acid without inhibitor additions does not fulfill the requirements imposed for removal of scale and prevention of copper deposits.
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