Study on magnesium alloy micro-arc oxidation gained from three kinds of electrolyte systems Part I—Phase composition and corrosion resistance of oxidation coatings
Micro-arc oxidation ceramic coatings were prepared on AZ19D magnesium alloy in three kinds of electrolytes by DC pulse method.The thickness,microhardness,phase composition and corrosion resistance of difference coatings were analyzed.The test results show that the growth rates of coatings are different in different electrolyte systems and the compositions of coatings formed are also different.By comparing electrochemical impendance spectroscopies(EIS) and potentiodynamic polarization curves of magnesium all...