Sulfuric acid and chloride ion corrosion resistant steel plate containing Sn and Sb and manufacturing method thereof

Abstract

The invention provides a steel plate containing Sn and Sb and resistant to corrosion of sulfuric acid and chloride ions and a manufacturing method of the steel plate. The steel plate comprises the following components: 0.050-0.079% of C; 0.20% to 0.45% of Si; 0.60% to 1.00% of Mn; less than or equal to 0.025% of P; s < = 0.0040%; 0.90% to 1.10% of Cr; ni: 0.05 to 0.30%; 0.20% to 0.40% of Cu; the content of Als is 0.025% to 0.050%; 0.035% to 0.050% of Ti; 0.08 to 0.14 percent of Sb; 0.10% to 0.15% of Sn; n < = 0.0040%; and the balance of Fe and inevitable inclusions. And the Sn-Sb-containing sulfuric acid and chloride ion corrosion-resistant steel plate is formed by matching with key field control processes such as a plate blank heating process and the like. The surface quality and the cold bending performance are good; the yield strength is not less than 345MPa, the tensile strength is not less than 470MPa, and the ductility is not less than 25%.

Description

technical field [0001] The invention belongs to the field of iron and steel materials and its manufacture, and in particular relates to a steel plate containing Sn and Sb resistant to sulfuric acid and chloride ion corrosion and a manufacturing method thereof. Background technique [0002] Weathering steel is atmospheric corrosion resistant steel. Compared with stainless steel, it can greatly reduce the manufacturing cost, and has good welding performance. Compared with ordinary carbon steel, it has good atmospheric corrosion resistance. [0003] In the existing corrosion-resistant steel manufacturing technology, the publication number CN 101775544 A published on July 14, 2010 discloses a sulfuric acid dew point corrosion-resistant steel KNS and its rolling method. Its chemical composition is: C≤0.10%, Si: 0.30%~0.40%, Mn: 0.70%~0.80%, V≤0.010%, Cu: 0.20~0.30%, Cr: 0.60%~0.90%, Ti: 0.015%~0.025%, Sb: ≤0.010%, S: ≤0.020%, P: ≤0.020%, the rest is Fe and unavoidable impurities...

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Problems solved by technology

The material also cannot meet the corrosion resistance requirements in the coexistence environment of sulfuric acid and chloride ions

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