The effect of solution ph of permanganate coating on the electrochemical characteristics of ZE41 magnesium alloy in chloride media

Abstract:

Replacement of heavy alloys components with light-weight materials has been of prime concern for automotive and aerospace manufactures during the last decade. The main driving force behind such direction is to reduce the fuel consumption and hence polluted CO2 emission. ZE41 is one of the magnesium alloys that was proposed for this function owing to its promising mechanical performance. However, the high corrosion susceptibility is the main reason that limits spreading such alloy in industry. This paper provides a deep investigation on the electrochemical characteristics and morphology of the film formed as a function of Mn-coating pHs in order to optimize the coating conditions. Results confirmed that the optimum coating pH is 7.5. Changing the coating pH around 7.5 has a detrimental effect on the localized corrosion resistance. © 2014 The Authors.

Año de publicación:

2014

Keywords:

• CORROSIÓN
• Permanganate treatment
• ZE41 Mg-Zn-rare earth alloy
• Clean protective coatings

Fuente:

scopus