等离子喷涂耐冲蚀陶瓷涂层的性能研究

中国腐蚀与防护学报

2011, Vol. 31

Issue (3): 196-201

研究报告

本期目录 | 过刊浏览

等离子喷涂耐冲蚀陶瓷涂层的性能研究

李守彪^1,2, 许立坤²,沈承金¹,李相波²

1. 中国矿业大学材料科学与工程学院徐州 221116
2. 中船重工七二五所海洋腐蚀与防护国防科技重点实验室青岛 266101

PERFORMANCE OF EROSION-RESISTANT CERAMIC COATINGS DEPOSITED BY PLASMA SPRAYING

LI Shoubiao^1,2, XU Likun², SHEN Chengjin¹, LI Xiangbo²

1. School of Materials Science and Engineering, China University of Mining & Technology, Xuzhou 221116
2. State key Laboratory for Marine Corrosion and Protection, Luoyang Ship Materials Research Institute,Qingdao 266101

全文: PDF(2130 KB)

摘要: 采用等离子喷涂工艺在高锰铝青铜基体上制备了 Al₂O₃-13%TiO₂和 Cr₂O₃•5SiO₂•3TiO₂两种耐冲< 蚀复合涂层，利用扫描电子显微镜(SEM)、激光扫描显微镜 (LSM)等手段观察分析了两种涂层的组织形貌，测试了两种涂层的显微硬度和结合强度，用电化学测量和失重测量分别研究了两种涂层在3.5%NaCl溶液中的电化学行为以及耐海水冲刷腐蚀性能。结果表明，Cr₂O₃•5SiO₂•3TiO₂ 涂层组织致密，无明显层状结构；陶瓷涂层在3.5%NaCl溶液中的电化学腐蚀行为主要取决于涂层的孔隙率；Cr₂O₃• 5SiO₂•3TiO₂涂层试样在动态海水中的冲刷腐蚀失重约为基体试样的1/9，表现出较Al₂O₃-13%TiO2涂层更优异的耐海水冲刷腐蚀性能。

关键词 ：等离子喷涂, 电化学, 陶瓷涂层, 冲刷腐蚀

Abstract：Al₂O₃-13%TiO₂and Cr₂O₃•5SiO₂•3TiO2 erosion-resistant ceramic coatings were deposited on Al-bronze alloy using plasma spraying process. The morphologies of the two coatings were investigated by means of scanning electron microscope (SEM) and laser scanning microscope (LSM). Microhardness and adhesion strength have been evaluated, respectively. The corrosion behavior of two coatings in 3.5% NaCl solution were characterized by potentiodynamic polarization and electrochemical impedance spectroscopy. SEM analysis of corroded surface and weight loss technique were used to study the erosion-corrosion of coated samples and uncoated sample in flowing seawater. The results indicated that Cr₂O₃•5SiO₂•3TiO₂coating has a much dense microstructure and the laminar microstructure was not obviously observed. The corrosion behavior of ceramic coatings was mainly related to the porosity of the coatings. Due to higher microhardness and adhesion strength, the weight loss of Cr₂O₃•5SiO₂•3TiO₂coated sample was nearly 1/9 of that of uncoated one, indicating better resistance to erosion-corrosion in flowing seawater than Al₂O₃-13%TiO₂ coating.

Key words： plasma spraying electrochemistry ceramic coating erosion-corrosion

收稿日期: 2010-10-09

ZTFLH:

TG174.4

通讯作者: 许立坤 E-mail: xulk@sunrui.net

Corresponding author: XU Likun E-mail: xulk@sunrui.net

作者简介: 李守彪, 男，1986年生，硕士生，研究方向为海洋腐蚀与防护

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李守彪, 许立坤,沈承金,李相波. 等离子喷涂耐冲蚀陶瓷涂层的性能研究[J]. 中国腐蚀与防护学报, 2011, 31(3): 196-201.
LI Shou-Biao, XU Li-Kun, CHEN Zhang-Jin, LI Xiang-Bei. PERFORMANCE OF EROSION-RESISTANT CERAMIC COATINGS DEPOSITED BY PLASMA SPRAYING. J Chin Soc Corr Pro, 2011, 31(3): 196-201.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2011/V31/I3/196

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