| 17—4PHMo钢的热处理与电化学腐蚀关系的研究 |
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| 引用本文： | 黄翠金,肖显东. 17—4PHMo钢的热处理与电化学腐蚀关系的研究[J]. 华南农业大学学报, 1987, 0(1) |
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| 作者姓名： | 黄翠金 肖显东 |
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| 作者单位： | 华南农业大学农业工程系(黄翠金)，广州重型机器厂(肖显东) |
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| 摘 要： | 本文讨论了17—4PHMo(OCr17Ni4Cu4Mo2Nb)钢在含1.8％H_2SO_4和4.5％NaCl的溶液中电化学腐蚀行为。试验表明:经正常热处理的试样,在含Cl~-和H~+的溶液中能生成稳定的钝化膜,这种钝化膜只有当金属阳极电位高于20毫伏时才能被击穿。同时,由于Epp值相对较正,即使钝化膜被击穿而产生局部的点蚀,也能重新钝化,恢复完整的钝化膜。本文还讨论了钢热处理后的显微组织,也讨论了热处理工艺与电化学性能之间的关系,从而阐明该钢在较高NaCl含量的酸性溶液中不易产生点腐蚀破坏。
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| 关 键 词： | 17—4PHMo钢 电化学腐蚀 正常热处理 纯化膜 阳极电位 |
A STUDY OF 17-4PHMo STEEL OF RELATIONSHIP BETWEEN HEAT TREATMENT AND ELECHEMICAL CORROSiON |
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| Huang Cuijin Xiao Xiandong. A STUDY OF 17-4PHMo STEEL OF RELATIONSHIP BETWEEN HEAT TREATMENT AND ELECHEMICAL CORROSiON[J]. JOURNAL OF SOUTH CHINA AGRICULTURAL UNIVERSITY, 1987, 0(1) |
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| Authors: | Huang Cuijin Xiao Xiandong |
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| Affiliation: | Huang Cuijin Xiao Xiandong(Department of Agricultural Engineering) (GUANGZHOU Heavy Machineng Plant) |
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| Abstract: | This paper discusses and analyses the electro-chemical corrosion of 17-4PHMO (OCr17Ni 4Cu4MO2Nb) steel in 1.8% H2SO4acid and 4.5% Nad solution. The test revealed - that the sample steel under normal heat treatment in Cl- and H+ solution having a stable passive film on its surface can be punctured when its anodic potential is higher than 20mV. Due to a relative positive Epp value, self-passivating at the site of corrodent Pitting arising from the punctured passive film, the passive ' film will become perfec again. Besides the microscopic structure of this steel after heat treatment is described, the relationship between heat treatment and its electrochemical property is also shown in this paper. It is concluded that pitting corrosion of this steel is hot liable to appear in acid solution with higher content of NaCl. |
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| Keywords: | 17-4PHMo steel Electro-chemical corrosion Normal heat treatment Stable passive film Anodic potential. |
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