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无机耐高温防护涂料的研制及性能

MU Chunhui, WANG Jing,JIANG Guojie, LI Kunyan, SUN Zhihua,GAO Dong

Electroplating & Finishing(2023)

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Abstract
以水溶性磷酸盐、铬酸盐为黏结剂,分别以CoNiCrAlY金属粉末和云母粉为主要填料,制备了无机高耐蚀防护底漆与面漆,用于镍基粉末高温合金的热腐蚀防护.对采用简单的空气喷涂工艺获得的复合涂层的附着力和耐热腐蚀性能进行了测试.在拉开测试中,底漆的破坏强度为24.82 MPa,100%内聚破坏,而底漆+面漆的破坏强度为13.62 MPa,30%为底漆和面漆的附着破坏,70%为面漆的内聚破坏.760℃热震测试后复合涂层无剥落.以亚硫酸钠和硫酸钙的混合物在 704℃下进行 10 个循环热腐蚀测试后基体未发生腐蚀.
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