In view of its superior characteristics such as high energy capability, long life, light weight, and low cost, aluminium alloy sacrificial anodes have become popular for the protection against corrosion of structures submerged in seawater. With a view to developing aluminium alloy hanging anodes and high efficiency aluminium alloy sacrificial anodes, different percentages of magnesium and bismuth were added separately to (Al + 5 % Zn + 0.03 % In), and electrochemical studies were carried out. The results show that the composition containing 0.4 % bismuth exhibits minimum open-circuit potentials and hence it can be used as a hanging anode. It was also observed that the closed-circuit potentials were shifted to the anodic direction with increasing magnesium and bismuth contents, and the efficiency of the anode was inversely proportional to the percentages of magnesium and bismuth in the alloy anode. Formation of intermetallic compounds with the addition of magnesium and bismuth are responsible for the decrease in anode efficiency and increase in closed-circuit potential.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Development of aluminium alloy anodes for cathodic protection of ships


    Additional title:

    Entwicklung von Aluminiumlegierungsanoden für den kathodischen Schutz von Schiffen


    Contributors:
    Gurrappa, I. (author) / Karnik, J.A. (author)

    Published in:

    Publication date :

    1996


    Size :

    5 Seiten, 4 Bilder, 2 Tabellen, 15 Quellen



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




    Cathodic protection of ships

    Smith, C.A. | Tema Archive | 1981


    Cathodic protection of ships

    Jensen, F. | Tema Archive | 1975


    Cathodic protection of ships

    Smith, C.A. | Tema Archive | 1982


    Cathodic protection of ships' hulls

    Juchniewicz, R. | Engineering Index Backfile | 1958


    Economics of ships cathodic protection

    Morgan, J.H. | Engineering Index Backfile | 1964