Influence of oxidation related structural defects on localized corrosion in HVAF-sprayed Fe-based metallic coatings
文献类型：期刊论文
| 作者 | Wu, J; Zhang, SD; Sun, WH; Wang, JQ; Wang, JQ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China. |
| 刊名 | SURFACE & COATINGS TECHNOLOGY
 |
| 出版日期 | 2018-02-15 |
| 卷号 | 335页码:205-218 |
| 关键词 | Constant-phase-element Electrochemical Impedance Spectroscopy Cavitation Erosion Behavior Nacl Solution Physical Interpretation Surface Distributions Amorphous Coatings Stainless-steel Water-uptake Capacitance |
| ISSN号 | 0257-8972 |
| 英文摘要 | Oxidation occurred in thermal spray process is an important problem deteriorating corrosion performance of thermal-sprayed Fe-based metallic coatings due to the formation of Cr-depleted zones and structural defects around the spray formed oxides. To clarify the correlation between the oxidation related structural defects formed during thermal spray process (i.e. the interparticle regions and the connected pores) and the localized corrosion, a dense Fe-based metallic coating with high Cr-content was fabricated, the long term immersion tests which continued for 30 days combined with electrochemical impedance spectroscopy measurements in 3.5 wt% NaCl were performed. It was found that electrolyte solution diffused to the inner coating through the interparticle oxide layers, and subsequently the localized corrosion developed along the interparticle oxide layers. A number of corrosion pits and corrosion channels were observed along with the interparticle oxide layers for the coating after one month immersion. Through sealing the diffusion pathways in the as-sprayed coatings by using aluminum phosphate, the corrosion resistance of the coatings was enhanced with decreased corrosion current density and improved endurance in long term immersion tests.; Oxidation occurred in thermal spray process is an important problem deteriorating corrosion performance of thermal-sprayed Fe-based metallic coatings due to the formation of Cr-depleted zones and structural defects around the spray formed oxides. To clarify the correlation between the oxidation related structural defects formed during thermal spray process (i.e. the interparticle regions and the connected pores) and the localized corrosion, a dense Fe-based metallic coating with high Cr-content was fabricated, the long term immersion tests which continued for 30 days combined with electrochemical impedance spectroscopy measurements in 3.5 wt% NaCl were performed. It was found that electrolyte solution diffused to the inner coating through the interparticle oxide layers, and subsequently the localized corrosion developed along the interparticle oxide layers. A number of corrosion pits and corrosion channels were observed along with the interparticle oxide layers for the coating after one month immersion. Through sealing the diffusion pathways in the as-sprayed coatings by using aluminum phosphate, the corrosion resistance of the coatings was enhanced with decreased corrosion current density and improved endurance in long term immersion tests. |
| 学科主题 | Materials Science, Coatings & Films ; Physics, Applied |
| 语种 | 英语 |
| 资助机构 | National Key Research and Development Program of China [2016YFB1100204]; National Natural Science Foundation of China [51471166, 51131006] |
| 公开日期 | 2018-06-05 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/79499]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Wang, JQ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Wu, J,Zhang, SD,Sun, WH,et al. Influence of oxidation related structural defects on localized corrosion in HVAF-sprayed Fe-based metallic coatings[J]. SURFACE & COATINGS TECHNOLOGY,2018,335:205-218. |
| APA | Wu, J,Zhang, SD,Sun, WH,Wang, JQ,&Wang, JQ .(2018).Influence of oxidation related structural defects on localized corrosion in HVAF-sprayed Fe-based metallic coatings.SURFACE & COATINGS TECHNOLOGY,335,205-218. |
| MLA | Wu, J,et al."Influence of oxidation related structural defects on localized corrosion in HVAF-sprayed Fe-based metallic coatings".SURFACE & COATINGS TECHNOLOGY 335(2018):205-218. |
入库方式： OAI收割
来源：金属研究所
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