(大連理工大學(xué)化工學(xué)院， 大連 116012)
摘 要: 研究了作為犧牲陽極材料的Mg-Al-Zn-Mn、Al-Zn-In-Si-Mg和Zn-Al-Cd合金與 A3鋼偶接時(shí),溶液中Cl-濃度和電偶對(duì)中陰陽極面積比變化對(duì)三種合金接觸腐蝕行為的影響。偶對(duì)陽極電偶電流密度jg隨Cl- 濃度增大而增大，jg與面積比成正比關(guān)系。偶對(duì) 電偶電勢(shì)Eg隨Cl- 濃度增大和面 積比減小向負(fù)向變化。當(dāng)偶對(duì)中陰極金屬材料為302 不銹鋼和紫銅時(shí)，jg隨Cl- 濃度增大有不同的變化趨勢(shì)。
關(guān)鍵字: 犧牲陽極 合金 接觸腐蝕 氯離子 濃度
（College of Chemical Engineering, Dalian University of Technology, Dalian 116012）
Abstract:The effects of Cl- concentration and area ratio Ac/Aa have been studied on galvanic corrosion behavior of Mg-Al-Zn -Mn, Al-Zn-In-Si-Mg and Zn-Al-Cd alloys coupled to A3. Results showed that the galvanic current density jg increases with increasing Cl- concentration, and jg is directly proportional to Ac/Aa. The galvanic potential Eg changes in the negative direction with increasing Cl- concentration and decreasing Ac/Aa. The change of jg varies with increasing Cl- concentration for anode alloys coupled to 302 stainless steel and copper.
Key words: sacrificial anode alloy galvanic corrosion chlorion concentration
