STUDY OF CORROSION INHIBITION BEHAVIOR OF PHOSPHOMOLYBDRIC ACID ON STAINLESS STEEL DURING ACETATE PRODUCTION
(0) Corrosion behavior of the complexes of para-toluenesulfonic acid (PTSA) and 12-phosphomolybdric acid (PMoA) on 316L stainless steel was investigated in the media simulated synthesizing butyl acetate in this work. In addition, industrial experiment was conducted in a plant of producing butyl acetate on 500 t/a scale. The experiment results indicated that PMoA was a highly effective corrosion inhibitor in improving the resistance to pitting and crevice corrosion of stainless steels in solutions containing PTSA and acetic acid (HAc), and improving the resistance of the passive film to breakdown, enhancing repassivation characteristics of the bare metal. Under researched conditions, the concentration of HAc, PTSA, and PMoA is 40％, 1.0％, 0.1％~0.2％wt., respectively, the corrosion rate of specimens was lower than 0.05mm/a at 100~140oC. Heat exchanger made by 316L stainless steel had no obvious corrosion, and showed metallic luster for 7 months.
WANG Jun LIU Wen-bin QIU Qi-hao MA Xin-peng
College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, China
国际会议
第九届工程结构完整性国际会议(The Ninth International Conference on Engineering Structural Integrity Assessment)
北京
英文
2007-10-15（万方平台首次上网日期，不代表论文的发表时间）