The Selection of Magnesium alloys as Sacrificial Anode for the Cathodic Protection of Underground Steel Structure

Various characterization 4 type of Mgsacrificial anodes (A,B,C and D from differentproducts) have been conducted such as chemicalcomposition, closed and opened potential, currentcapacity and efficiency test by galvanostatic method.On the basis of the results, the presence of impuritieselement gives detrimental effects of electrochemicalproperties and anode efficiency. The presence ofhigh concentration of impurities for Cu, Fe and Nihave cathodic effect to Mg anode such as anode Aand B , where the indication of galvanic corrosiontake place in Mg anode. Mg anode A and B werelower current capacities, current efficiencies andconsumption rates than Mg anode C and D. Mganode A and B have a lower performance comparedto Mg anode C and D Mg anode A and B are noteligible become a standard sacrificial anodes toprotect steel structure in soil. International Journal of Engineering Trends and Technology (IJETT) – Volume 51 Number 2 September 2017