| Nb微合金化对低合金高强钢耐海水腐蚀性能的影响 |
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| 作者姓名： | 聂中萍 吴开明 张弦 刘静 马洪峰 赵华中 |
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| 作者单位： | 武汉科技大学国际钢铁研究院,湖北 武汉,430081,武汉科技大学国际钢铁研究院,湖北 武汉,430081,武汉科技大学国际钢铁研究院,湖北 武汉,430081,武汉科技大学国际钢铁研究院,湖北 武汉,430081,武汉铁锚焊接材料股份有限公司,湖北 武汉,430085,武汉铁锚焊接材料股份有限公司,湖北 武汉,430085 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)资助项目(2014CB643300)；湖北省技术创新专项重大项目(2016AAA022). |
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| 摘 要： | 利用室内模拟海水加速腐蚀试验及电化学分析,研究了Nb微合金化对Cu-Cr-Ni-P系低合金高强钢耐海水腐蚀性能的影响。结果表明,含Nb钢与不含Nb钢组织均由铁素体和珠光体构成,但Nb微合金化后钢中珠光体组织减少且晶粒细化明显,其在模拟海水介质中的平均腐蚀速率与不含Nb钢相比,降低了约12%,阳极腐蚀电流密度也有所降低。由此可见,在Cu-Cr-Ni-P系低合金高强钢中加入Nb元素有助于提高其耐海水腐蚀性能。
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| 关 键 词： | Nb微合金化 低合金高强钢 海水腐蚀 电化学性能 晶粒细化 |
| 收稿时间： | 2017/6/19 0:00:00 |
Effect of Nb microalloying on the corrosion resistance of high-strength low-alloy steel to seawater |
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| Authors: | Nie Zhongping Wu Kaiming Zhang Xian Liu Jing Ma Hongfeng and Zhao Huazhong |
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| Institution: | International Research Institute for Steel Technology, Wuhan University of Science and Technology, Wuhan 430081, China,International Research Institute for Steel Technology, Wuhan University of Science and Technology, Wuhan 430081, China,International Research Institute for Steel Technology, Wuhan University of Science and Technology, Wuhan 430081, China,International Research Institute for Steel Technology, Wuhan University of Science and Technology, Wuhan 430081, China,Wuhan Anchor Welding Consumables Co., Ltd., Wuhan 430085, China and Wuhan Anchor Welding Consumables Co., Ltd., Wuhan 430085, China |
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| Abstract: | By means of indoor accelerated corrosion test and electrochemical analysis, the effects of Nb microalloying on the seawater corrosion resistance of Cu-Cr-Ni-P based high-strength low-alloy steel were investigated. The results show that the microstrucutre of Nb-free steel and Nb-bearing steel are both ferrite and pearlite, but less amount of pearlite and finer grain size are observed in the Nb-bearing steel. Moreover, the average corrosion rate of the steel microalloyed with Nb under the simulated seawater medium is reduced by about 12% compared with the Nb-free steel, along with the reduction of anode corrosion current density. Thus, the addition of Nb element in the Cu-Cr-Ni-P based high-strength low-alloy steel is beneficial to improving the seawater corrosion resistance. |
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| Keywords: | Nb microalloying high-strength low-alloy steel (HSLA) seawater corrosion electrochemical property grain refinement |
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