刘元福,陈吉,孙彦伟,黄澳,宋见,常季.表面离子渗氮对 SS304 耐蚀性的研究[J].表面技术,2016,45(11):93-98.
LIU Yuan-fu,CHEN Ji,SUN Yan-wei,HUANG Ao,SONG Jian,CHANG Ji.Effects of Surface Ion Nitriding on the Corrosion Resistance of SS304[J].Surface Technology,2016,45(11):93-98 |
| 表面离子渗氮对 SS304 耐蚀性的研究 |
| Effects of Surface Ion Nitriding on the Corrosion Resistance of SS304 |
| 投稿时间：2016-02-27 修订日期：2016-11-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2016.11.014 |
| 中文关键词: SS304 离子渗氮 渗氮层 耐蚀性 |
| 英文关键词:SS304 ion nitriding nitrided layer corrsion resistance |
| 基金项目:辽宁省自然科学基金项目（201202127） |
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| Author | Institution |
| LIU Yuan-fu | School of Mechanical Engineering, Liaoning Shihua University, Fushun 113001, China |
| CHEN Ji | School of Mechanical Engineering, Liaoning Shihua University, Fushun 113001, China |
| SUN Yan-wei | School of Mechanical Engineering, Liaoning Shihua University, Fushun 113001, China |
| HUANG Ao | School of Mechanical Engineering, Liaoning Shihua University, Fushun 113001, China |
| SONG Jian | School of Mechanical Engineering, Liaoning Shihua University, Fushun 113001, China |
| CHANG Ji | School of Mechanical Engineering, Liaoning Shihua University, Fushun 113001, China |
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| 中文摘要: |
| 目的 对 SS304 在 300 Pa 不同温度下进行表面离子渗氮，研究渗氮层和 SS304 的耐蚀性。方法 通过动电位极化曲线和交流阻抗谱分析 SS304 和渗氮层在 3.5%NaCl 溶液中的耐蚀性，采取金相显微镜、 SEM、 XRD 对渗氮层和 SS304 的表面形貌和相组成进行分析测试，采用显微硬度计和镜像显微镜对渗氮层和 SS304 的硬度和截面形貌进行分析测试。 结果 SS304 中有 γ 相和 M 相， 400 ℃ 时渗氮层试样出现 γN、Fe2~3N、Fe4N，大于 450 ℃ 时，渗氮层试样出现了 Fe2~3N、Fe4N、CrN。渗氮层在 3.5%NaCl溶液中， 400 ℃ 时渗氮层的自腐蚀电流密度比 SS304 的小，大于 450 ℃ 时，渗氮层的自腐蚀电流密度比 SS304 的小且随渗氮温度增加而逐渐增大； 400 ℃ 时渗氮层的自腐蚀电位比 SS304 的大， 大于 450 ℃时，渗氮层的自腐蚀电位比 SS304 的大且随渗氮温度增加而逐渐降低； 400 ℃ 时渗氮层表面的膜电阻比 SS304 的大，大于≥450 ℃ 时，渗氮层表面的膜电阻比 SS304 的小。 结论 渗氮层的耐蚀性随温度的升高而降低， 400 ℃ 时渗氮层的耐蚀性比 SS304 的好，大于 450 ℃ 时，渗氮层的耐蚀性比 SS304 的低；400 ℃ 时渗氮层生成氮扩大奥氏体（γN），可大大增加耐蚀性，大于 450 ℃ 时，渗氮层生成 CrN，耐蚀性减小。 |
| 英文摘要: |
| The work aims to study corrosion resistance of nitrided layer and SS304 by performing surface ion nitriding to SS304 at different temperature at 300Pa. The corrosion resistance of nitrided layer and SS304 in 3.5% NaCl solution was analyzed by potentiodynamic polarization curve and electrochemical impedance spectroscopy. Morphology and phase composition of the nitrided layer and SS304 were analyzed and tested by ustilizing metalloscope, SEM and XRD. Hardness and cross-section morphology of the two were analyzed and tested by ustilizing microhardness tester and metallographic microscope. γ and M phases were present in SS304, γN, Fe2~3N and Fe4N were present in the nitrided layer sample at 400 . Fe ℃ 2~3N, Fe4N and CrN were present at ＞450 ℃. In the 3.5% NaCl solution, self-corrosion current density of the nitrided layer was lower than that of SS304 at 400 ℃ . At ＞450 ℃, it was also lower than that of SS304 and gradually increased as the nitriding temperature increased. The self-corrosion corrosion potential of the nitrided layer was higher than that of SS304 at 400 ℃. At ＞450 ℃, it was higher than the latter and gradually decreased as the nitriding temperature increased. At 400 ℃, membrane resistance of the nitrided layer was bigger than that of SS304; at ≥450 ℃, that was smaller. Inconclusion, the corrosion resistance of the nitrided layer reduces as the temperature increases. The corrosion resistance of nitrided layer is superior to that of SS304 at 400 ℃ and lower than that of SS304 at ＞450 ℃. Nitrogen expanded austenite (γN) is produced in the nitrided layer at 400 ℃, significantly improving corrosion resistance of the nitrided layer while CrN is produced at ＞450 ℃, reducing the corrosion resistance simultaneously. |
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