Study on Microstructure and Properties of A New Type of Sulfuric Acid and Hydrochloric Acid Corrosion-Resistant Cold Rolled Steel
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摘要: 以一种新型冷轧耐蚀钢为研究对象,分析了Mo、Sb等元素对实验钢的显微组织,力学性能,耐硫酸、耐盐酸腐蚀等性能的影响。结果表明:实验钢添加Mo、Sb等元素后,铁素体晶粒尺寸只有6.24 μm,屈服强度为384 MPa,抗拉强度为459 MPa,伸长率为27.5 %;在力学性能与SPA-C产品相当的基础上,实验钢在硫酸腐蚀环境下的腐蚀速率为0.14 mg/(cm2·h),在盐酸腐蚀环境下的腐蚀速率为0.31 mg/(cm2·h),实验钢的耐腐蚀性能较传统SPA-C的提升显著。Abstract: A new type of corrosion-resistant cold rolled steel is taken as the object, and the effects of Mo and Sb elements on the microstructure, mechanical properties, and sulfuric acid and hydrochloric acid resistances of the steel are investigated. The results indicate that after adding Mo and Sb elements to the experimental steel, the ferrite grain size is only 6.24 μm, the yield strength is 384 MPa, the tensile strength is 459 MPa, and the elongation is 27.5 %. The mechanical properties can meet demands by regulates for the SPA-C steel. Besides, the corrosion rate of the experimental steel in the sulfuric acid medium is 0.14 mg/(cm2·h), and that in the hydrochloric acid medium is 0.31 mg/(cm2·h). The corrosion resistance of the experimental steel promotes by 10 times than that of the SPA-C steel.
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