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Electrochemical determination of hydrogen entry in pickling process of high strength low alloy steel

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Document pages: 7 pages

Abstract: Pickling with hydrochloric acid is a standard method for cleaning steel surfaces before hot dip galvanizing. When ordinary low strength steel is pickled, the hydrogen formed in the pickling reaction has no obvious harmful effect on the mechanical properties of the steel. However, in the pickling process of high strength steel, hydrogen penetration into the steel may cause serious damage. The acid pickling effect of high strength low alloy steel (HSLA) was studied by using the battery structure based on devanaathan stachurski method, improved anode surface treatment and acid hydrogen production. The permeability and permeability of hydrogen are measured by electrochemical cell. Hydrochloric acid is used on one side of the steel sample and sodium hydroxide solution is used on the other side of the steel samplether side. No protective coating, for example, palladium on the anodic side of the sample, is needed. The penetration rate of hydrogen into the steel and exit rate from the steel were lower for higher strength steel.

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