邢学刚,杨耀军,卢盼娜,韩志军.添加不同稀土元素对固体包埋法在 304 不锈钢表面制备 Ti / Cr-RE 双层涂层电化学性能的影响[J].表面技术,2015,44(11):7-13.
XING Xue-gang,YANG Yao-jun,LU Pan-na,HAN Zhi-jun.Influence of Adding Various Rare Earth Elements on Electrochemical Corrosion Resistance of Ti / Cr-RE Coatings Fabricated on 304 Stainless Steel by Pack Cementation[J].Surface Technology,2015,44(11):7-13 |
| 添加不同稀土元素对固体包埋法在 304 不锈钢表面制备 Ti / Cr-RE 双层涂层电化学性能的影响 |
| Influence of Adding Various Rare Earth Elements on Electrochemical Corrosion Resistance of Ti / Cr-RE Coatings Fabricated on 304 Stainless Steel by Pack Cementation |
| 投稿时间：2015-08-31 修订日期：2015-11-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2015.11.002 |
| 中文关键词: 304 不锈钢 双层涂层 稀土元素 电化学腐蚀 固体包埋法 |
| 英文关键词:304 stainless steel duplex coatings rare earth element electrochemical corrosion resistance pack cementation |
| 基金项目:国家自然科学基金(51171125,11172195);国家青年基金(E010101);山西省高等学校科技创新项目(2014jyt03);太原理工大学校青年基金(2012L073,2013T065) |
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| Author | Institution |
| XING Xue-gang | College of Mechanics, Taiyuan University of Technology, Taiyuan 030024, China |
| YANG Yao-jun | Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan 030024, China |
| LU Pan-na | College of Mechanics, Taiyuan University of Technology, Taiyuan 030024, China |
| HAN Zhi-jun | College of Mechanics, Taiyuan University of Technology, Taiyuan 030024, China |
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| 中文摘要: |
| 目的 选择合适的稀土制备 Ti/ Cr-RE 双层涂层,提高不锈钢的耐腐蚀性能。 方法 采用两步粉末包埋法,先在 304 不锈钢表面渗 Ti,再制备稀土改性 Cr 涂层,获得 Ti/ Cr-RE 双层涂层。 通过添加不同的稀土氧化物 Y2O3 和 CeO2,获得两种双层涂层,对比分析涂层的表面形貌、断面形貌及物相组成,利用电化学测试方法测定 304 不锈钢基体及两种 Ti/ Cr-RE 双层涂层在 3. 5% (质量分数)NaCl 溶液中的电化学腐蚀性能。 结果 添加不同稀土元素钇、铈,都能在渗 Ti 不锈钢表面形成一层致密、连续的稀土改性渗铬层。 在两种稀土元素改性的 Cr 涂层中,稀土元素分别与 Cr,Fe,Ni,Ti 形成了金属间化合物。 304 不锈钢基体的自腐蚀电位为-0. 324 V,腐蚀电流密度为 0. 1363 μA/ cm2;钇改性铬涂层的自腐蚀电位为-0. 341 V,腐蚀电流密度为 0. 2058 μA/ cm2;铈改性铬涂层则具有更高的自腐蚀电位(-0. 263 V)及更低的腐蚀电流密度(0. 030 86 μA/ cm2)。 结论 钇改性铬涂层不能提高 304 不锈钢基体的耐腐蚀性能,铈改性铬涂层可以明显提高基体的耐腐蚀性能。 |
| 英文摘要: |
| Objective To prepare Ti/ Cr-RE coatings on 304 stainless steel with suitable rare earth elements so as to improve corrosion resistance of stainless steel. Methods The Ti coating and Cr-RE coating were deposited on 304 stainless steel successively via pack cementation. In order to obtain two different Ti / Cr-RE coatings, Y2 O3 and CeO2 were used as RE sources. The sample surface and cross-sectional micrographs were investigated by scanning electron microscopy (SEM). The phase composition of sample surface was detected by X-ray diffraction (XRD). Electrochemical experiments were carried out to investigate the corrosion resistance of the 304 stainless steel substrate and the two kinds of Ti / Cr-RE double-layer coating in 3. 5% NaCl solution. Results It was concluded from all the outcomes that the dense and continuous Cr-RE coatings can be formed on the Ti stainless steel by adding rare earth elements Y and Ce. In the two kinds of Cr coatings modified by rare earth elements, intermetallic compounds were formed from the rare earth elements with Cr, Fe, Ni, and Ti respectively. The corresponding corrosion potential of 304 stainless steel was -0. 324 V, and the corrosion current density was 0. 1363 μA / cm2 . The corresponding corrosion potential of Cr-Y coating was -0. 341 V and the corrosion current density was 0. 2058 μA / cm2 ,while the Cr-Ce coating presented higher corresponding corrosion potential of -0. 263 V and lower corrosion current density of 0. 030 86 μA / cm2 . Conclusion The Cr-Y coating does not show a promotion in electrochemical corrosion resistance compared with 304 stainless steel, while the Cr-Ce coating presents a good performance in electrochemical corrosion resistance in 3. 5% NaCl solution. |
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