李轩鹏,郭亚鑫,华帅,范爱兰,刘小萍,唐宾.304 不锈钢表面 TiN 涂层的耐蚀性能[J].表面技术,2016,45(4):40-45.
LI Xuan-peng,GUO Ya-xin,HUA Shuai,FAN Ai-lan,LIU Xiao-ping,TANG Bin.Corrosion Resistance of TiN Coating on 304 Stainless Steel[J].Surface Technology,2016,45(4):40-45
304 不锈钢表面 TiN 涂层的耐蚀性能
Corrosion Resistance of TiN Coating on 304 Stainless Steel
投稿时间:2015-12-24  修订日期:2016-04-20
DOI:10.16490/j.cnki.issn.1001-3660.2016.04.007
中文关键词:  304 不锈钢  TiN 涂层  磁控溅射  极化曲线  电化学噪声  腐蚀形貌
英文关键词:304 stainless steel  TiN coating  magnetron sputtering  polarization curves  electrochemical noise  corrosion micrograph
基金项目:国家自然科学基金(51171125,51474154,51471191,51474154);山西省科学技术发展项目基金(20110321051);山西省留学基金项目(2011-038);山西省高校“131冶领军人才工程(02100830);2015 年山西省研究生教育改革项目(02100778)
作者单位
李轩鹏 太原理工大学 表面工程研究所, 太原 030024 
郭亚鑫 太原理工大学 表面工程研究所, 太原 030024 
华帅 太原理工大学 表面工程研究所, 太原 030024 
范爱兰 太原理工大学 表面工程研究所, 太原 030024 
刘小萍 太原理工大学 表面工程研究所, 太原 030024 
唐宾 太原理工大学 表面工程研究所, 太原 030024 
AuthorInstitution
LI Xuan-peng Research Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan 030024, China 
GUO Ya-xin Research Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan 030024, China 
HUA Shuai Research Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan 030024, China 
FAN Ai-lan Research Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan 030024, China 
LIU Xiao-ping Research Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan 030024, China 
TANG Bin Research Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan 030024, China 
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中文摘要:
      目的 提高 304 不锈钢的耐腐蚀性能。 方法 采用磁控溅射技术在 304 不锈钢表面沉积 TiN 涂层,并采用 SEM、XRD 及 GDOES 对涂层的表面形貌、成分进行测试。 通过极化曲线和电化学噪声技术评价 TiN 涂层和基体在 pH = 2. 5 的 3. 5% (质量分数)NaCl 溶液中的腐蚀行为,并研究涂层的失效机制。结果 在 304 不锈钢表面沉积了厚约 1 μm 且均匀、致密的 TiN 涂层。 极化曲线分析表明,基体和 TiN 涂层试样出现了自钝化和点蚀现象,其中 304 不锈钢基体的腐蚀电位为-0. 41 V,腐蚀电流密度为 8. 01×10-6 A/ cm2,与之相比,TiN 涂层的腐蚀电位(-0. 28V)明显增大,腐蚀电流密度(6. 34×10-8 A/ cm2 )显著降低。 电化学噪声分析显示,在浸泡初期,TiN 涂层电极电流暂态峰数量较少,强度较大,噪声电阻较低,而随着浸泡时间的延长,其电流暂态峰数量增加,强度降低,噪声电阻明显大于 304 不锈钢基体。 腐蚀形貌观察表明,304 不锈钢和 TiN 涂层表面均出现了点蚀。 结论 TiN 涂层能够明显改善基体的耐蚀性能。TiN 涂层主要起物理阻碍作用,涂层的主要失效形式是涂层表面的微观缺陷和破裂。
英文摘要:
      Objective To improve the corrosion resistance of 304 stainless steel. Methods TiN coating was fabricated on the surface of 304 stainless steel by magnetron sputtering. The microstructure distribution and chemical composition of TiN coating were characterized by SEM, XRD and GDOES. The corrosion behavior of 304 stainless steel and TiN coatings in 3. 5 wt. % NaCl solution (pH=2. 5) was discussed by polarization curves and electrochemical noise technique. The failure mechanisms of coating was studied according to the electrochemical noise signals, the noise resistance and corrosion morphology. Results The smooth and dense TiN coating with a thickness of about 1 μm was deposited on 304 stainless steel. Substrate and TiN coating showed passivation and pitting in polarization curves, and the values of corrosion potential (Ecorr) and corrosion current density (Jcorr) of substrate were -0. 41 V and 8. 01×10 -6 A / cm2 , respectively. However, for TiN coating the value of Ecorr( -0. 28 V)shifted toward the positive, and the value of Jcorr(6. 34×10 -8 A / cm2 ) decreased sharply. All the results showed the TiN coating exhibited an excellent corrosion resistance. The results of electrochemical noise showed that the TiN coating revealed fewer transients, higher amplitude current transients and lower noise resistance (Rn) at beginning of the testing. However, with increasing immersion time the current transients of TiN coating showed a significant change, and the value of Rn had a sharp increase, compared with the substrate. The corrosion micrograph showed that the pitting occurred on the substrate and TiN coating. Conclusion TiN coating could obviously improve the corrosion resistance of 304 stainless steel. TiN coating acted as the physical barrier, and the corrosion resistance was mainly limited by the pinhole and break.
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