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CORROSION INHIBITOR FOR PICKLING OF CARBON STEEL IN HYDROCHLORIC ACID

Zhang Min-qing

Abstract

The efficiency for suppresing acid fogging and corrosion inhibition of iron during pickling process of iron in hydrochloric acid is studied by means of addition of agents such as urotropine,Dye Leveller AN,sodium dodecyl sulfate,OP-10 and so on.The influence of temperature and concentration of corrosion inhibitor in the pickling bath were studied.It is focused on influence of inhibitor on recovery of waste hydrochloric acid by roasting.In practical application,the efficiency of corrosion inhibition reaches ninety percent and the influences of inhibitor on recovery of waste hydrochloric acid by roasting is very little.

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Key concepts: Pickling, Hydrochloric acid, Roasting, Corrosion, Corrosion inhibitor, Carbon steel, Metallurgy, Nuclear chemistry