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首页> 外文会议>NACE annual conference & exposition >ASSESSING THE CORROSION CHARACTERISTICS OF METAL/CERAMIC COMPOSITESIN SALINE ENVIRONMENTS - ASPECTS OF THE INTERACTIONS BETWEEN PHASES
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ASSESSING THE CORROSION CHARACTERISTICS OF METAL/CERAMIC COMPOSITESIN SALINE ENVIRONMENTS - ASPECTS OF THE INTERACTIONS BETWEEN PHASES

机译：评估盐/盐环境中金属/陶瓷复合材料的腐蚀特性-相间相互作用的方面

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The corrosion behaviour of WC-Co-Cr thermal-spray coatings has been given more attention latelydue to their increased use in tribological applications where corrosion can occur. In this paper themechanisms of corrosion of a WC-Co-Cr coating are presented with the focus on understanding theoxidation, dissolution rates and mechanisms in 3.5% NaC1 at different temperatures. Coatingcharacterization prior to and after corrosion was carried out using scanning electron microscope (SEM),X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). DC electrochemical acceleratedcorrosion techniques (potentiodynamic and potentiostatic tests) were performed in order to evaluate thecorrosion properties of the coating. Aider the corrosion tests the solution was analysed using theInductively Couple Plasma (ICP) technique and a considerable amount of dissolved tungsten wasdetected. Through linking electrochemical information with water analysis, a sequence of reactionsinvolved in corrosion of WC-Co-Cr is proposed. The practical implications in relation to corrosion anderosion-corrosion are also discussed.
机译：由于在可能发生腐蚀的摩擦学应用中越来越多地使用WC-Co-Cr热喷涂涂层，因此其腐蚀行为近来受到更多关注。本文介绍了WC-Co-Cr涂层的腐蚀机理，重点是了解在不同温度下3.5％NaCl中的氧化，溶解速率和机理。使用扫描电子显微镜（SEM），X射线衍射（XRD）和X射线光电子能谱（XPS）进行腐蚀前后的涂层表征。为了评估涂层的腐蚀性能，进行了直流电化学加速腐蚀技术（电位动力学和恒电位测试）。进行腐蚀测试后，使用电感耦合等离子体（ICP）技术分析溶液，并检测到大量溶解的钨。通过将电化学信息与水分析联系起来，提出了一系列腐蚀WC-Co-Cr的反应序列。还讨论了与腐蚀和腐蚀相关的实际含义。

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