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首页> 外文期刊>International Journal of Electrochemical Science >Effect of the Composition and the Thermal Treatment on Corrosion Resistance of WC-Co-Al2O3 Ceramic Coatings
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Effect of the Composition and the Thermal Treatment on Corrosion Resistance of WC-Co-Al2O3 Ceramic Coatings

机译：组成和热处理对WC-Co-Al 2 O 3 陶瓷涂层耐蚀性的影响

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摘要

The effect of the composition and thermal treatment of WC-Co-Al2O3 coatings (without and with ofAl2O3) on the C45 mild steel surface on the corrosion resistance were examined. The aggressive acidicchloride (1.2 M Cl-) environment was used for the testing of corrosion resistance of the materials. Theceramic coatings (CC) on the steel surfaces were deposited by a electrospark (ESD) technique. Thecontent of aluminum oxide (Al2O3) was varied between 5 and 15 wt.%. However, thermal treatment ofthe tested coatings were done for temperature which was changed between 25 and 1200 0C. The anticorrosion properties of the coatings without and after heat treatment were mainly investigated byelectrochemical methods. Moreover, the scanning electron microscope (SEM) was employed for theobservation the surface of materials. It was found that the structure of coatings were depended from thecomposition of electrospark electrodes. However, the corrosion rate of the substrate decreases aboutsix times after applying the WC-5Co-15Al2O3 coating. Unfortunately, after thermal treatment at 8000C the WC-Co and WC-Co-Al2O3 ceramic coatings lose their anti-corrosion properties. Ceramiccoatings lose their anti-corrosive properties.
机译：研究了C45低碳钢表面上WC-Co-Al2O3涂层的组成和热处理（无和有Al2O3的情况）对耐蚀性的影响。腐蚀性的酸性氯化物（1.2 M Cl-）环境用于测试材料的耐腐蚀性。钢表面的陶瓷涂层（CC）通过电火花（ESD）技术沉积。氧化铝（Al 2 O 3）的含量在5至15重量％之间变化。但是，对测试的涂层进行了热处理，其温度在25至1200 0C之间变化。主要通过电化学方法研究未经和经过热处理的涂层的防腐性能。此外，采用扫描电子显微镜（SEM）观察材料表面。发现涂层的结构取决于电火花电极的组成。但是，在涂覆WC-5Co-15Al2O3涂层后，基材的腐蚀速率降低了大约六倍。不幸的是，在8000℃下进行热处理后，WC-Co和WC-Co-Al2O3陶瓷涂层失去了防腐蚀性能。陶瓷涂料失去了防腐蚀性能。

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