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CORROSION OF CARBON AND STAINLESS STEELS IN KRAFT DIGESTERS

机译:牛皮纸消化器中碳钢和不锈钢的腐蚀

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摘要

The numerous mechanisms of corrosion and cracking in kraft batch and continuous digesters arernreviewed. For carbon steel these include stress corrosion cracking, general corrosion thinning, pitting corrosion,rnand preferential attack of welds and weld buildup, and erosion-corrosion. For austenitic stainless steels theserninclude general corrosion thinning, pitting corrosion, intergranular attack and stress corrosion cracking.rnCorrosion protection measures include anodic protection, application of stainless steel weld overlay, and thermalrnspray coating. Construction of new digesters from duplex stainless steels offers the best opportunity for longrncorrosion-free and maintenance-free service.
机译:综述了牛皮纸间歇蒸煮器和连续蒸煮器中腐蚀和开裂的多种机理。对于碳钢,这些包括应力腐蚀开裂,普遍腐蚀变薄,点蚀,焊缝和焊缝堆积和腐蚀,以及腐蚀腐蚀。对于奥氏体不锈钢,其解决方案包括一般腐蚀变薄,点蚀,晶间腐蚀和应力腐蚀开裂。腐蚀防护措施包括阳极保护,不锈钢焊缝的覆盖和热喷涂涂层。用双相不锈钢建造新的蒸煮器提供了长期免腐蚀和免维护的最佳机会。

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