高振,郝建民,韩建军,鲁元,陈永楠,李世波.等离子喷涂工艺对锅炉管束用Fe 基非晶涂层组织结构和耐蚀性能的影响[J].表面技术,2015,44(1):81-87.
GAO Zhen,HAO Jian-min,HAN Jian-jun,LU Yuan,CHEN Yong-nan,LI Shi-bo.Effect of Spray Process on the Microstructure and Corrosion-resistance of Fe-based Amorphous Coatings Obtained by Plasma Spray on the Boiler Tubes[J].Surface Technology,2015,44(1):81-87 |
| 等离子喷涂工艺对锅炉管束用Fe 基非晶涂层组织结构和耐蚀性能的影响 |
| Effect of Spray Process on the Microstructure and Corrosion-resistance of Fe-based Amorphous Coatings Obtained by Plasma Spray on the Boiler Tubes |
| 投稿时间：2014-09-23 修订日期：2015-01-20 |
| DOI： |
| 中文关键词: 锅炉管束 等离子喷涂 非晶涂层 耐蚀性 |
| 英文关键词:boiler tubes plasma spray amorphous coating corrosion resistance |
| 基金项目:国家质检总局科技计划项目(2013QK111);长安大学中央高校基金(2014G2310019) |
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| Author | Institution |
| GAO Zhen | Institute of Material Surface Strengthening, Chang'an University, Xi'an 710064, China |
| HAO Jian-min | Institute of Material Surface Strengthening, Chang'an University, Xi'an 710064, China |
| HAN Jian-jun | Xi'an Special Equipment Inspection Institute, Xi'an 710065, China |
| LU Yuan | Xi'an Special Equipment Inspection Institute, Xi'an 710065, China |
| CHEN Yong-nan | Institute of Material Surface Strengthening, Chang'an University, Xi'an 710064, China |
| LI Shi-bo | Institute of Material Surface Strengthening, Chang'an University, Xi'an 710064, China |
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| 中文摘要: |
| 目的 研究等离子喷涂功率和喷涂时间对锅炉管束用 Fe 基非晶涂层的相组成、微观组织结构及涂层耐蚀性能的影响。 方法 通过 X 射线衍射、扫描电子显微镜和三电极电化学研究进行分析。 结果涂层主要由非晶相组成,表面较为平整致密;随着喷涂功率和喷涂时间的增加,涂层非晶相含量降低,孔隙率降低,致密性升高。 非晶涂层在 0. 5 mol/ L H2SO4 溶液和在 3. 5% (质量分数)NaCl 溶液中均表现出良好的钝化作用,在 0. 5 mol/ L H2SO4 溶液中钝化区较宽,在 3. 5% NaCl 溶液中自腐蚀电流密度较低。 随喷涂功率和时间的增加,阳极极化曲线钝化区加宽,电流密度降低。 结论 喷涂功率升高会导致涂层孔隙率下降,喷涂时间增加则致使涂层厚度增加,腐蚀介质渗透到基体的表面路径和阻力增加,从而可以进一步改善 Fe 基非晶涂层的耐蚀性能。 |
| 英文摘要: |
| Objective To investigate the effects of plasma spray power and time on the phase, microstructure and corrosion-resistance of the amorphous coating on the boiler tubes. Methods XRD, SEM and electrochemical polarization research were adopted. Results The coating with high fraction of amorphous phase was obtained, which had a flat and compact surface. The amorphous fraction and porosity decreased and the density increased with the increasing spray power and time. The coatings exhibited an excellent ability to resist corrosion with wide passive region in 0. 5 mol/ L H2SO4 and 3. 5% NaCl solutions. And the coatings exhibited wider passive region and lower corrosion current density in 0. 5 mol/ L H2SO4 and 3. 5% NaCl solutions, respectively. With increase of the spray power and time, the anodic polarization curves of the amorphous coatings were passivated with wider passive region and lower passive current density. Conclusion The path and flow resistance that corrosive liquid permeated the substrate were increased, and the corrosion resistance of the coating was improved, owing to the decreased porosity and increased coating thickness with the increasing spray power and time. |
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