不同鋅含量鋁鋅合金腐蝕行為研究

Corrosion Behavior of Al-Zn Alloys with Various Zn Contents

針對鋁鋅合金鍍層之防蝕應用需求，本研究配製15種不同鋅含量（at.%）之鋁鋅合金（純Al、Al-5Zn、Al-10Zn、Al-12.1Zn、Al-16Zn、Al-22Zn、Al-28.4Zn、Al-38Zn、Al-42Zn、Al-46Zn、Al-52Zn、Al-54Zn、Al-56Zn、Al-98.5Zn、純Zn），並利用電化學方法評估這些不同成分鋁鋅合金在3% NaCl水溶液中之腐蝕行為，包括其腐蝕電位、孔蝕電位、腐蝕電流以及耐間隙腐蝕趨勢。綜合各項量測結果顯示鋅含量在5至10at.%之鋁鋅合金同時具有較佳之耐蝕性及陰極保護效果。

For the application needs of Al-Zn alloy coatings in corrosion prevention, 15 Al-Zn alloys with various Zn contents ( pure Al, Al-5Zn, Al-10Zn, Al-12.1Zn, Al-16Zn, Al-22Zn, Al-28.4Zn, Al-38Zn, Al-42Zn, Al-46Zn, Al-52Zn, Al-54Zn, Al-56Zn, Al-98.5Zn and pure Zn ) were used in the study. The electrochemical techniques were used to evaluate the corrosion behavior of Al-Zn alloys in 3% NaCl solution, including corrosion potential, pitting corrosion potential, corrosion current, and crevice corrosion resistance. The results of experiments showed that the Al-Zn alloys which contain Zn between 5 and 10 at.% have better corrosion resistance and cathodic protection.