烟气脱硫技术中的湿法脱硫腐蚀问题一直是该技术的核心部分，脱硫塔防腐蚀技术主要要有：采用耐腐蚀不锈钢、玻璃钢（FPR）、耐腐蚀玻璃钢整体成型或者碳钢内衬非金属衬里材料，这些材料包括耐腐蚀胶板、玻璃鳞片胶泥等。目前，主流技术脱硫塔主体采用碳钢、内防腐或316L不锈钢内衬。但在实际运行中有的出现了不锈钢防腐层失效，致使脱硫塔腐蚀穿孔，影响了设备的安全经济运行。本文其失效就的原因进行分析，并针对性地提出了技改方案。
The corrosion problem of wet desulfurization in flue gas desulfurization technology is the core part of the technology, desulfurization tower corrosion technology mainly have: the corrosion resistance of stainless steel, glass steel (FPR), corrosion resistant FRP integral molding or carbon steel lined with non-metal lining materials, these materials include corrosion resistant plastic, glass flake clay etc.. At present, the main main technology of desulfurization tower is carbon steel, internal anticorrosion or 316L stainless steel lining. However, in actual operation, some of the stainless steel anticorrosion layers fail to cause the corrosion and perforation of the desulfurization tower, which affects the safe and economic operation of the equipment. In this paper, the reasons for the failure of this paper are analyzed, and the technical reform scheme is put forward.
不锈钢失效的原因：
The reasons for the failure of stainless steel:
经分析氯离子对脱硫系统的危害是造成上述问题的原因。
The analysis of the harm of chlorine ion on the desulfurization system is the cause of the above problems.
采用内不锈钢不合理：
The use of internal stainless steel is not reasonable.
脱硫吸收液呈弱酸性且含有一定量的氯离子，针对这种腐蚀环境一般的做法是：要选用碳钢为基材，然脱硫装置后对碳钢进行防腐处理。
The desulfurization absorption liquid is weak acid and contains a certain amount of chloride ions. For this corrosive environment, the general practice is to select carbon steel as the base material, and then desulphurization device to treat carbon steel.