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制备了几种钼杂多酸盐作为水质缓蚀剂。缓蚀试验表明在pH为8.0—8.5时12-钼磷酸钠具有较好的缓蚀性能,另一方面,钼杂多酸盐的缓蚀能力和缓蚀机理既不同于单钼酸钠,也不同于单钼酸钠和磷酸盐的简单复合,故钼杂多酸盐有可能广泛地应用在工业上。从极化曲线和pH电位滴定结果,提出了钼杂多酸盐的缓蚀机理的初步见解,即钼杂多酸盐在碳钢表面形成Fe_n[PMoxOy]型或M_n[PFeMoxOy]型络合物保护膜。
Several molybdenum heteropoly acid salts were prepared as water quality inhibitors. Corrosion tests showed that 12-Molybdate had good corrosion inhibition performance at pH 8.0-8.5. On the other hand, the corrosion inhibition and inhibition mechanism of Molybdate was different from that of Monomolybdate In the simple combination of sodium monophosphate and phosphate, so molybdenum heteropoly acid salt may be widely used in industry. Based on the results of polarization curves and pH potentiometric titration, a preliminary insight into the corrosion inhibition mechanism of molybdenum heteropolyacid salts is proposed, in which molybdenum heteropolyacid salt forms Fe_n [PMoxOy] or M_n [PFeMoxOy] complex on the surface of carbon steel Protective film.