首页> 外国专利> HOT ROLLED STEEL FOR COMPLEX CORROSION RESISTANCE TO HYDROCHLORIC ACID AND SULFURIC ACID, HAVING EXCELLENT CORROSION RESISTANCE, AND METHOD OF MANUFACTURING THE SAME

HOT ROLLED STEEL FOR COMPLEX CORROSION RESISTANCE TO HYDROCHLORIC ACID AND SULFURIC ACID, HAVING EXCELLENT CORROSION RESISTANCE, AND METHOD OF MANUFACTURING THE SAME

机译：热轧钢，具有对盐酸和硫酸的复杂耐蚀性，极好的耐蚀性及其制造方法

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摘要

The present invention relates to a hot rolled steel sheet for complex corrosion resistance to hydrochloric acid and sulfuric acid having excellent corrosion resistance, and a method of manufacturing the same, and more specifically, to a hot rolled steel sheet for complex corrosion resistance to hydrochloric acid and sulfuric acid, and a method of manufacturing the same which can be properly used as a material for a desulphurization unit, a denitrification unit, and a preheater in a thermal power station, and parts thereof. The hot rolled steel sheet for complex corrosion resistance to hydrochloric acid and sulfuric acid having excellent corrosion resistance according to an embodiment of the present invention comprises 0.05-0.1 wt% of C, 0.5 (not inclusive)-1.5 wt% of Mn, 0.02 wt% or lower of P, 0.02 wt% or lower of S, 0.01-0.1 wt% of Al, 0.2-0.7 wt% of Cu, and the remainder consisting of Fe and inevitable impurities. A Cu-concentration layer of 200 nm is formed directly underneath the surface. According to the present invention, a corrosion resistant layer is formed on the surface of a steel sheet to provide the hot rolled steel sheet which is a lower alloy, but has excellent corrosion resistance compared to a conventional steel sheet with complex corrosion resistance to hydrochloric acid and sulfuric acid. Additionally, the hot rolled steel sheet according to the present invention can be adequately used as a material for a desulphurization unit and a denitrification unit in a thermal power station where complex corrosion from hydrochloric acid and sulfuric acid occurs, a smoke emission pipe of a boiler, and a preheater requiring relatively thick material, and the life thereof can be substantially extended.

机译：具有优异的耐腐蚀性的对盐酸和硫酸具有复杂的耐腐蚀性的热轧钢板及其制造方法，更具体地，涉及对盐酸的具有复杂的耐腐蚀性的热轧钢板。硫酸，硫酸及其制造方法，可以适当地用作火力发电厂中的脱硫单元，反硝化单元和预热器的材料及其部件。根据本发明的一个实施方式的具有优异的耐腐蚀性的对盐酸和硫酸具有复杂耐腐蚀性的热轧钢板包含0.05-0.1重量％的C，0.5（不包括端点）-1.5重量％的Mn，0.02重量％。另外，P为0.01重量％以下，S为0.02重量％以下，Al为0.01〜0.1重量％，Cu为0.2〜0.7重量％，其余为Fe和不可避免的杂质。直接在表面下方形成200 nm的Cu浓度层。根据本发明，在钢板的表面上形成有耐腐蚀层，以提供低合金的热轧钢板，但是与对盐酸具有复杂耐腐蚀性的常规钢板相比，具有优异的耐腐蚀性。和硫酸。另外，本发明的热轧钢板可以适当地用作发生由盐酸和硫酸引起的复合腐蚀，锅炉的排烟管的热电站中的脱硫单元和脱氮单元的材料。，以及需要相对较厚材料的预热器，其寿命可以大大延长。

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公开/公告号KR20150062176A

专利类型
公开/公告日2015-06-08

原文格式PDF
申请/专利权人 POSCO;
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申请/专利号KR20130145717
发明设计人 YOON JEONG BONG;KIM JONG HWA;LEE BYOUNG HO;
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申请日2013-11-27
分类号C22C38;B21B3;C21D8/02;C21D9/46;C22C38/16;
国家 KR
入库时间 2022-08-21 14:59:56

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