火力发电厂冷油器用BFe30-1-1管成膜工艺筛选  

Screening of Film Forming Process for BFe30-1-1 Tube of Oil Cooler in Thermal Power Plant

作　　者：郑子行 索晓娜 金恺宸 ZHENG Zihang;SUO Xiaona;JIN Kaichen(Shanghai Marine Equipment Research Institute,Shanghai 200031,China)

机构地区：[1]上海船舶设备研究所,上海200031

出　　处：《腐蚀与防护》2022年第8期61-64,共4页Corrosion & Protection

摘　　要：针对某沿海电厂冷油器部分新换BFe30-1-1管(B30白铜管)出现了腐蚀的问题,对B30白铜管现有的几种成膜工艺进行了筛选,对比研究了BTA、MBT、FeSO_(4)膜层对B30白铜管在自然海水、含Na_(2)S污染海水及酸化海水中的保护效果。结果表明:铜试剂成膜及氧化成膜工艺不适用于B30白铜管的防腐蚀处理;BTA、MBT膜层在pH 5.3的酸化海水中耐点蚀性能偏低;FeSO_(4)膜层在自然海水、含Na_(2)S污染海水及酸化海水中的耐点蚀性能与老管接近,冷油器B30白铜管新管适用FeSO_(4)成膜工艺。Aiming at the corrosion of new BFe30-1-1(B30cupronickel)tubes of oil cooler in a coastal power plant,the existing film forming processes of B30cupronickel tube were screened.The protective effects of BTA,MBT and FeSO_(4)coatings on B30cupronickel tubes in natural seawater,polluted seawater containing Na_(2)S and acidified seawater were studied.The results show that cupric reagent and oxidation film forming processes were not suitable for anti-corrosion treatment of B30cupronickel tubes.The pitting corrosion resistance of BTA and MBT films was low in acidified seawater with pH of 5.3.The pitting corrosion resistance of FeSO_(4) film in natural seawater,polluted seawater containing Na_(2)S and acidified seawater was similar to that of the old tubes.So the FeSO_(4)film forming process was suitable for new B30cupronickel tubes of oil cooler.

关 键 词：冷油器 BFe30-1-1管 腐蚀 成膜工艺 

分 类 号：TG174[金属学及工艺—金属表面处理]