一、前言目前国内外合成氨厂在砜胺脱碳系统中大多采用五氧化二钒作缓蚀剂。因五氧化钒价格昂贵,故推广应用受到一定限制。本报告叙述了在砜胺脱碳液中以硅代钒缓蚀剂的试验研究工作。二、腐蚀原因探索试验脱碳液由多种成份组成。为了寻找造成腐蚀的主要原因,首先在脱碳系统二氧化碳再生塔内进行挂片试验。将处理好的碳钢试片分别挂在塔板间,经过一检修周期,液相部位的试片全部腐蚀,气相部位试片只有二 I. Introduction At present, synthetic ammonia plants at home and abroad mostly use vanadium pentoxide as a corrosion inhibitor in the sulfonamides decarburization system. Due to the expensive vanadium pentoxide, it is subject to certain restrictions on the promotion and application. This report describes the experimental research on the silicon-substituted vanadium inhibitor in sulfonamide decarburizing solution. Second, explore the reasons for corrosion Test decarburization by a variety of ingredients. In order to find the main cause of corrosion, the coupon test was first carried out in the carbon dioxide regeneration tower of the decarbonization system. Will deal with the carbon steel specimens were hanging in the tray, after a maintenance cycle, the liquid part of the test piece all corrosion, only two gas samples