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1982年6月,日本腐蚀协会召开了一次有40名专家出席的专题讨论会,交流关于“硫酸露点腐蚀”的研究成果,主要内容简介如下:1.腐蚀机理(1)对于加热炉,烟气中究竟有多少SO_2转化成 SO_3,不仅与燃料含硫量、烟气含氧量有关,还与吸热面及灰垢层的成分、形态有关,灰垢层中的 V_2O_5和Fe_2O_3对 SO_2→SO_3的反应起催化作用,加剧露点腐蚀。(2)烟气所凝结的硫酸的浓度越低,其腐蚀性越大。有的炉子即使在停工期
June 1982, Japan Corrosion Association held a panel of 40 experts attended the symposium on the exchange of “sulfuric acid dew point corrosion,” the research results, the main contents are as follows: 1. Corrosion mechanism (1) for the furnace, flue gas How much SO_2 is converted to SO_3 is not only related to the sulfur content of fuel and the oxygen content of flue gas but also to the composition and morphology of endothermic surface and gray scale layer. The effects of V_2O_5 and Fe_2O_3 in lime scale layer on SO_2 → SO_3 The reaction plays a catalytic role, increasing dew point corrosion. (2) The lower the concentration of sulfuric acid condensed by flue gas, the more corrosive it is. Some stove even in the downtime