不同鋅含量鋁鋅合金腐蝕行為研究

Corrosion Behavior of AI-Zn Alloys with Various Zn Contents

10.6376/JCCE.200406.0169

張世穎(Shih-Ying Chang)；陳富謀(Fu-Mo Chen)；莊東漢(Tung-Han Chuang)

鋁鋅合金 ； 鋅含量 ； 耐蝕性 ； Al-Zn alloys ； 3% NaCl ； Zn contents ； Corrosion resistance

防蝕工程

18卷2期（2004 / 06 / 01）

169 - 176

繁體中文

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10 at.％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-l0Zn, Al-12.lZn, Al-l6Zn, 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% NaC1 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.