热镀锌合金化钢板的耐腐蚀性能研究.pdf

30 11 Vol. 30 No. 11 2009 11 CORROSION PROTECTION November 2009 1, 2 1 1 3 1, 2 2 1 3 , , , , , , , (1. , 100081; 2. , 650093; 3. , 243000) : (NSST) DX56 , GI GA , GI GA 2% NaCl Tafel (EIS)NSST ,GA GI , , GA GI Tafel GI GA2% NaCl ,,GA GI ,,GAGI ; EIS GA GI GA GI , GA : ; ; Tafel; : TG174. 3 : A : 10052 748X(2009)04 Corrosion2resistant Properties of Hot2dip Galvannealed Steel Sheets 1, 2 1 1 3 1, 2 2 IU Xin , JIANG She2ming , YUAN Xun2hua , YANG Xing2liang , I Ya2dong , H E Ming2yi , 1 3 ZHANG Qi2fu , ZHANG Jian (1. National Engineering ab of Advanced Coating Technology for Met al Material, China Iron Steel Research Institute Group,Beijing 100081, China; 2. Research Section of Mat erial Protection, Kunming University of Science and Technology, Kunming 650093, China; 3. Technology Center,Mac anshan Iron Steel Co., td. ,Mac anshan 243000, China) Abstract: Neutral salt spray test (NSST) and electrochemical test of DX56 were performed t o study its corrosion properties. The changes of red rust area and weightloss of GI sheet and GA sheet as well as the Tafel polarization curves and electrochemical impedance spectroscopy ( EIS) in 2 wt.% NaClsolution were obtained. NSST showed that the red rust on GA sheet occurred much earlier than GI sheet and the weightloss of GA sheet was less than GI sheet obviously. Tafel curves showed that both of GI sheet and GA sheetc s corrosion behaved to be activated dissolution without pas