通过比较铸态、退火和固溶态Al-Zn-Sn-Ga-Mg合金的组织和电化学性能,研究了热处理对该阳极微观组织和电化学性能的影响。结果显示：均匀化处理能减少阳极晶界偏析,抑制析氢腐蚀和提高阳极电流效率,且固溶处理的效果明显优于退火处理。经固溶处理后阳极的电流效率达93.4%,工作电位负而稳定,且腐蚀形貌均匀,表明该合金具有较好的综合电化学性能。
Effects of heat treatment（cooled in furnace and water quenched） on microstructure and electrochemical properties of Al-Zn-Sn-Ga-Mg alloy as sacrificial anode were investigated by means of optical microscope,SEM and electrochemical measurements.The results show that the heat treatment of annealing and solution treatment at 470 ℃ reduces the segregation at grain boundary,restrains the hydrogen evolution and improves the current efficiency.The effect of solution treatment is superior to that of annealing.The alloy treated with solution treatment exhibits the negative operating potential,uniform corrosion feature and the current efficiency of 93.4% is obtained,indicating better electrochemical properties.
参考文献
| [1] | 吴荫顺;曹备.阴极保护和阳极保护-原理、技术及工程应用[M].北京:中国石化出版社,2007 |
| [2] | 王璇.铟职业病案凸显政策疏漏[J].劳动保护,2008(09):34-37. |
| [3] | Salinas DR;Bessone JB;Garcia SG .Influence of alloying elements and microstructure on aluminium sacrificial anode performance: case of Al-Zn[J].Journal of Applied Electrochemistry,1999(9):1063-1071. |
| [4] | Ponehel B M;Hosrst R L .Performance of A1-Zn-Sn alloy anodes in sea water service[J].Materials Protection,1968,7(03):38-41. |
| [5] | Lennox T J;Peterson M H;Groover R E .A study of electrochemical efficiencies of aluminum galvanic anodes in sea water[J].Materials Protection,1968,7(02):33-37. |
| [6] | Lin J C;Shih H C .Improvement of the current efficiency of an AI-Zn-ln anode by heat-treatment[J].Journal of the Electrochemical Society,1987,134(04):817-823. |
| [7] | 廖海星,齐公台,喻克雄.固溶处理对含RE铝牺牲阳极组织与性能的影响[J].材料热处理学报,2004(03):54-56. |
| [8] | 马景灵,文九巴,李旭东,李光福,焦孟旺,郭炜.热处理对Al-Zn-In-Mg-Ti合金组织与电化学性能的影响[J].材料热处理学报,2008(03):113-117. |
| [9] | 齐公台,郭稚弧,魏伯康,林汉同.固溶处理对Al-Zn-In-Sn-Mg阳极组织与电化学性能的影响[J].金属热处理学报,2000(04):68-72. |
| [10] | S R Ashok;A Venkataramani;G T Parthiban .Performance of aluminium anodes under heat treatment[J].Corrosion Prevention & Control,2002(2):60-63. |
| [11] | GB/T17848-1999.牺牲阳极电化学性能试验方法[S]. |
| [12] | Ma J L;Wen J B .The effects of lanthanum on microstructure and electrochemical properties of A1-Zn-In based sacrificial anode alloys[J].Corrosion Science,2009,51(09):2115-2119. |
| [13] | Flamini, DO;Saidman, SB .Polarisation behaviour of Al-Zn-Ga alloy in chloride medium[J].Journal of Applied Electrochemistry,2008(5):663-668. |
| [14] | Cabot P L;Garrido J A;Perez E et al.EIS study of heat-treated AI-Zn-Mg alloys in the passive and transpassive potential regions[J].Electrochimica Acta,1995,40(04):447-454. |
| [15] | Bessone J B;Salinas D R;Mayer C E et al.An EIS study of aluminium harrier-type oxide films formed in different media[J].Electrochimica Acta,1992,37(12):2283-2290. |
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