一种适用于高温高盐硫酸介质的缓蚀剂分析-analysis of a corrosion inhibitor suitable for high temperature and high salt sulfuric acid medium.docxVIP

咪唑啉硫脲基季铵盐与丙炔醇的复配缓蚀剂的具备更为广泛的适应性。（4） 探索了 316 不锈钢以外的其它不锈钢材在此类环境中的耐蚀能力及缓蚀剂的适 用性。以 254smo 不锈钢为主要研究对象，利用挂片实验研究了高品质不锈钢在高温高盐的中等浓度硫酸环境中的腐蚀行为及其与缓蚀剂联用的防护方案。 关键词：316 不锈钢，硫酸，缓蚀剂，高温，高浓度AbstractAcidification is a common technology which is often used in the industrial production process. For example, in order to reduce the corrosion caused by acidity of crude oil, and improve the quality of crude oil itself, new technology about removing naphthenic acid in situ has caused much attention. During this process, oilfield wastewater is often used to dilute concentrated sulfuric acid which accompany with intense heat emission and result in the formation of a high temperature and high salt content environment which is extremely corrosive. Therefore, there is an urgent need for study on corrosion protection of stainless steel in such a concentrated sulfuric acid environment with high temperature and salt content.A local high- temperature and high-salt intermediate sulfuric acid environment will formed in the pipeline in the process of refining naphthenic acid, We studied the influence of salt and temperature on the corrosion behavior of pipeline materials including main substrate (316 stainless steel) and other high-quality steel materials, The corrosion behaviors in sulfuric acid environment were measured with electrochemical method and weight loss method. We evaluated the inhibition performance of all kinds of single inhibitors and commercial ones in a typical environmental. According to the comparison experiments, we have synthesized a series of inhibitors which contained the main component (quaternary ammonium salt) and other effective assistants. We obtained three kinds of recipes after measuring the inhibition performances of the synthesized inhibitors in different environment. The main conclusion of this paper are asinclude the followings:The effect of chloride-containing salt on corrosion behavior of 316 stainless steelin sulfuric acid solution. We studied the effect of chloride