Research on Acid Corrosion Resistance of Steel and Application
The effect of the content of chemical elements in acid corrosion-resistant steel on its acid corrosion resistance at different temperatures and different sulfuric acid con-centrations was tested using the sulfuric acid immersion test.The test results show that the acid corrosion resistance performance of acid corrosion-resistant steel is mainly closely re-lated to the content of Sb,S and other elements.When the content of Ni elements was low,increasing the content of Ni element had no significant effect on acid resistance perfor-mance.Under the conditions of 20℃,20%H2SO4 and 70℃,50%H2SO4 conditions,the rust layer formation in acid corrosion-resistant steels is mainly through the enrichment of el-ements such as Sb,S,Cu and so on,which can hinder further corrosion between the sub-strate and the corrosive medium and improve the acid corrosion resistance performance.This feature is widely used in gas pipelines,liquid transportation tankers and other industries.
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