| 王奎,张慧霞,郭为民,傅宇东.浸水率对低合金钢海水腐蚀行为的影响[J].装备环境工程,2014,11(3):14-19. WANG Kui,ZHANG Hui-xia,GUO Wei-min,FU Yu-dong.Research on Corrosion Behavior of Low Alloy Steel Under the Natural Seawater Wet-Dry Alternate Condition[J].Equipment Environmental Engineering,2014,11(3):14-19. |
| 浸水率对低合金钢海水腐蚀行为的影响 |
| Research on Corrosion Behavior of Low Alloy Steel Under the Natural Seawater Wet-Dry Alternate Condition |
| 投稿时间：2014-03-22 修订日期：2014-04-09 |
| DOI：10.7643/issn.1672-9242.2014.03.004 |
| 中文关键词: 低合金钢 腐蚀 浸水率 天然海水 |
| 英文关键词:low alloy steel corrosion wet-dry ratio natural seawater |
| 基金项目: |
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| Author | Institution |
| WANG Kui | College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China;Science and Technology on Marine Corrosion and Protection Laboratory,Luoyang Ship Materials Research Institute, Qingdao 266071, China |
| ZHANG Hui-xia | Science and Technology on Marine Corrosion and Protection Laboratory,Luoyang Ship Materials Research Institute, Qingdao 266071, China |
| GUO Wei-min | Science and Technology on Marine Corrosion and Protection Laboratory,Luoyang Ship Materials Research Institute, Qingdao 266071, China |
| FU Yu-dong | College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China |
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| 中文摘要: |
| 目的 计算不同浸水率试样的平均腐蚀速率,并与全浸条件下的腐蚀行为进行对比研究。方法 采用电化学测量技术,测量不同干湿循环后试样在海水中的开路电位、极化电阻和电化学交流阻抗,分析不同浸水率对低合金钢电化学性能的影响。 利用三维视频显微镜观察不同浸水率试样的腐蚀形貌,采用 X 射线分析仪分析锈层组成。 结果 干湿交替条件下低合金钢的腐蚀速率比全浸条件下增大 1 个数量级,自腐蚀电位正移 150 mV 左右,极化电阻增大 2 个数量级;且随着浸水率增大,腐蚀速率减小,自腐蚀电位无明显变化,试验初期电阻增大,但是试验后期无明显变化。 结论 观察腐蚀形貌和锈层组成, 全浸条件下以 FeOOH 为主, 干湿交替条件下出现较多的Fe3O4。 |
| 英文摘要: |
| Objective To calculate the average corrosion rate of samples with different wet-dry ratios, and to compare with the corrosion behavior under full immersion condition. Methods Open circuit potential, polarization resistance and electrochemical impedance of the samples in seawater were measured after various wet-dry cycles using electrochemical measurement method, and the effects of wet-dry ratio on the electrochemical properties of low alloy steel were analyzed. 3-D video microscopy was used to observe the corrosion morphology of samples with different wet-dry ratios, and X-Ray Diffraction was applied to analyze the composition of the rust-layer. Results The results showed that the corrosion rate of low alloy steel was increased by an order of magnitude, the free corrosion potential had a positive shift of 150 mV, and the polarization resistance was increased by two orders of magnitude under the wet-dry alternating condition comparing with that under full immersion in seawater. With the increase of the wet-dry ratio, the corrosion rate declined, and the free corrosion potential had no obvious change. Moreover, the polarization resistance increased at the early test stage, while there was no obvious change at the later stage. Conclusion Observation of corrosion morphology and rust-layer composition showed that the corrosion products under full immersion condition were mainly composed of FeOOH, while the amount of Fe3O4 was higher under dry-wet alternating condition. |
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