在TP347不锈钢片表面制备了有机聚硅氮烷先驱体陶瓷涂层，对有无涂层试样分别进行高温HCl气体和KCl堆盐腐蚀试验，并采用增重法对试样的腐蚀质量增加曲线进行分析。结果表明：制得的涂层表面均匀致密，与基体紧密连接；在500，525，550 ℃ HCl气体中，涂层试样的腐蚀速率较空白试样的均有所降低；在KCl堆盐中，无涂层试样的质量随时间的延长呈先增加后减小的趋势，涂层试样的耐蚀性较好，且在500 ℃下基体内部未检测到Cl元素，在550 ℃下基体内部Cl含量较高，表明Cl^-逐渐向试样内部扩散；服役温度在涂层玻璃粉软化温度以下时，涂层可有效阻隔Cl^-扩散至基体内部，提高涂层的保护性能。

An organopolysilazane precursor ceramic coating was prepared on the surface of TP347 stainless steel sheet. High-temperature HCl gas and KCl heap salt corrosion tests were performed on coated and uncoated samples, and the corrosion mass increase curves of the samples were analyzed by weight gain method. The results show that the prepared coating had a uniform and compact surface and was closely connected with the substrate. In the HCl gas at 500, 525, 550 ℃, the corrosion rates of the coated samples were lower than that of the blank samples. In the KCl heap salt, the mass of the uncoated samples increased first and then decreased with the extension of time. The corrosion resistance of the coated samples was relatively good, and no Cl element was detected in the substrate at 500 ℃. The Cl content in the matrix was high at 550 ℃, indicating that Cl^- gradually diffused into the samples. When the service temperature was below the softening temperature of the coating glass powder, the coating could effectively block the diffusion of Cl^- into the substrate, improving the protective performance of the coating.