陶瓷颗粒添加对热喷涂不锈钢涂层耐蚀性的影响

doi:10.11868/j.issn.1001-4381.2020.001177

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摘要

采用超音速火焰喷涂（HVAF）方法成功制备出不同种类及粒度陶瓷颗粒复合的不锈钢涂层，系统研究陶瓷颗粒的种类及粒度对复合涂层的硬度、孔隙率与耐蚀性能的影响；通过扫描电子显微镜、全自动硬度计、Image Pro Plus软件以及电化学工作站等分析测试技术对不锈钢/陶瓷颗粒复合涂层的微观结构、硬度及腐蚀行为进行系统表征与分析。结果表明：粗粒径棕刚玉（Al₂O₃）复合的不锈钢涂层的孔隙率低（0.7863%）、硬度高（637HV_0.1）且耐蚀性能优异，其自腐蚀电位为-454.14 mV、自腐蚀电流密度为22.208 mA·cm^-2；细粒径碳化硅（SiC）复合的不锈钢涂层具有较高的硬度（600HV_0.1）及较好的耐蚀性能，其自腐蚀电位为-463.68 mV、自腐蚀电流密度为23.738 mA·cm^-2。

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	唐全
	张锁德
	徐民
	王建强

关键词 ：不锈钢涂层, 超音速火焰喷涂, 陶瓷颗粒, 耐蚀性

Abstract：

The ceramic particles of different types and sizes reinforced stainless steel composite coatings were successfully prepared by high-velocity air fuel (HVAF) spraying technique. The effects of the types and sizes of ceramic particles on the hardness, porosity and corrosion resistance of the composite coating were systematically studied. The microstructure, hardness and corrosion behavior of stainless steel/ceramic particle composite coating were systematically characterized and analyzed by scanning electron microscope, automatic hardness tester, Image Pro Plus software and electrochemical workstation. The results show that the larger brown alumina (Al₂O₃) particles reinforced stainless steel composite coating has low porosity (0.7863%), high hardness (637HV_0.1) and excellent corrosion resistance, and its self-corrosion potential is -454.14 mV and self-corrosion current density is 22.208 mA·cm^-2. The fine silicon carbide (SiC) particles reinforced stainless steel composite coating also has a relatively high hardness (600HV_0.1) and good corrosion resistance, and its self-corrosion potential is -463.68 mV and self-corrosion current density is 23.738 mA·cm^-2.

Key words： stainless steel coating high-velocity air fuel (HVAF) spraying ceramic particle corrosion resistance

收稿日期: 2020-12-21 出版日期: 2021-11-12

中图分类号:

TG174.442

基金资助:国家自然科学基金项目(51701214);国家自然科学基金联合基金项目(U1908219)

通讯作者: 张锁德,徐民 E-mail: sdzhang@imr.ac.cn;xum@smm.neu.edu.cn

作者简介: 徐民(1967-), 男, 副教授, 博士, 主要从事非晶和纳米晶磁性材料及微磁学模拟研究, 联系地址: 辽宁省沈阳市和平区文化路三巷11号东北大学材料科学与工程学院(110819), E-mail: xum@smm.neu.edu.cn
张锁德(1982-), 男, 副研究员, 博士, 研究方向为非晶态合金及涂层腐蚀行为与机理, 联系地址: 辽宁省沈阳市沈河区文化路72号中国科学院金属研究所(110016), E-mail: sdzhang@imr.ac.cn

引用本文:

唐全, 张锁德, 徐民, 王建强. 陶瓷颗粒添加对热喷涂不锈钢涂层耐蚀性的影响[J]. 材料工程, 2021, 49(11): 125-135.
Quan TANG, Suo-de ZHANG, Min XU, Jian-qiang WANG. Effect of ceramic particles on corrosion resistance of thermal sprayed stainless steel coating. Journal of Materials Engineering, 2021, 49(11): 125-135.

链接本文:

http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2020.001177 或 http://jme.biam.ac.cn/CN/Y2021/V49/I11/125

Table 1 不锈钢粉末的化学成分 (质量分数/%)

Table 2 不锈钢粉末与陶瓷颗粒配比工艺

Table 3 HVAF喷涂工艺参数

Fig.1 不锈钢粉末的SEM形貌及陶瓷颗粒的激光共聚焦显微镜照片
(a)不锈钢粉末；(b)220目氧化铝；(c)600目氧化铝；(d)220目碳化硅；(e)600目碳化硅

Fig.2 涂层的X射线衍射图谱

Fig.3 不锈钢复合涂层的截面SEM形貌
(a)A1涂层；(b)A2涂层；(c)C1涂层；(d)C2涂层

Fig.4 不锈钢复合涂层的表面SEM形貌
(a)A1涂层；(b)A2涂层；(c)C1涂层；(d)C2涂层

Fig.5 A2涂层的截面形貌及选框区域元素的分布

Fig.6 C2涂层的截面形貌及选框区域元素的分布

Table 4 不锈钢复合涂层孔隙率

Fig.7 不锈钢复合涂层及基体的维氏硬度

Fig.8 涂层硬度测试压痕形貌对比
(a)无缺陷区域；(b)缺陷区域

Fig.9 不锈钢复合涂层在3.5%NaCl溶液中的极化曲线

Table 5 不锈钢复合涂层在3.5%NaCl溶液中的电化学参数

Fig.10 不锈钢复合涂层的Nyquist图

Fig.11 不锈钢复合涂层的Bode图

Fig.12 腐蚀后复合涂层表面SEM形貌
(a), (b)大粒径碳化硅；(c), (d)小粒径碳化硅

Fig.13 涂层在NaCl溶液中腐蚀演化示意图
(a)C1涂层腐蚀前；(b)C1涂层腐蚀后；(c)C2涂层腐蚀前；(d)C2涂层腐蚀后

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