研究了一种基于十八胺的新型复配缓蚀剂在低温和高温下的成膜效果, 与传统的纯十八胺和纯咪唑啉成膜缓蚀剂进行了对比。利用高压釜模拟现场水汽环境, 进行挂片试验。通过憎水性试验、硫酸铜点滴试验、电化学阻抗测量和电镜扫描等手段, 综合评价试片的成膜效果和保护膜的耐蚀性; 通过气相色谱-质谱GC-MS分析复配缓蚀剂挂片试验后的分解产物。结果表明, 该复配缓蚀剂在低温和高温下均有良好成膜效果, 其高温分解产物中不含低分子有机酸等有害物质。该缓蚀剂适用于生产实际, 具有重要的应用价值。

The film-forming effect at low and high temperatures of a new kind of compound inhibitor based on octadecylamine was studied, with taking two kinds of traditional inhibitors, pure octadecyamine and pure imidazoline, as comparison tests, in order to compare the film-forming effect of these three inhibitors. Coupon test was performed with an autoclave simulating the on-site water-vapor environment of power plant. The film-forming effect of the specimens and the corrosion-resistance of the protective film were evaluated by hydrophobic test, acid copper sulfate drip test, EIS test and scanning electron microscopy (SEM) test. The gas chromatograph mass spectrometer GC-MS was used to analyze the decomposition products of the compound inhibitor after coupon test at high temperature. The results show that the compound inhibitor can form film well whether at low temperature or at high temperature and no low-molecular-weight organic acids and other harmful ingredients were found in decomposition products. The compound inhibitor can be applied to practice safely and efficiently.