EIS studies of the corrosion of Mg alloys in NaCl solutions

Submitted by alexL on Mon, 07/07/2014 - 11:02

A summary of the available Rp data measured by the EIS for various Mg alloys is given below:

alloy electrolyte equivalent circuit Rp reference
AXJ530   0.05 M NaCl, 0.1 M NaOH, and 0.025 M H2O2 at pH 12.3  ---- 50 (2hrs) - 250 (16 hrs) kΩ /cm2   Amira et al.,/Electrochemical Study of AXJ530 Magnesium Alloy Behavior in Alkaline NaCl Solution, Advanced Engineering Materials 2007, 9, No. 11 973-980
AZ31   3.5% NaCl  R(QR)  70-550 Ω /cm2  Lei J., Li L., Pan F., "Environmental Friendly Corrosion Inhibitors for Magnesium Alloys" in "Magnesium Alloys - Corrosion and Surface Treatments" 2010 Intech 47-64 
3A21 and 7A09    3.5% NaCl R(Q(R (Q(RL)))))  1.6 (30min) - 130 (15days) kΩ /cm2  B. Wang et al. / Materials and Design 50 (2013) 15–21
 AZ91 0.01M NaCl at pH=12   R(QR)  1.5-1.8 (up to 10 hrs)  kΩ /cm2  N.D. Nam et al. / Corrosion Science 64 (2012) 263–271
AZ91D AZ31E AZ91E   physiological NaCl containing solutions

 R(CR)(CR)

R(QR(LR))(QR)

 0.1 - 6 kΩ /cm2 Fekry A., "Electrochemical Corrosion Behavior of Magnesium Alloys" in "Biological Solutions in Magnesium Alloys - Corrosion and Surface Treatments", Intech 2009 65-92
 nominal Mg   3.5% NaCl   ----  0.27 (1d) - 0.39 (7d) kΩ /cm2 Z. Qiao et al. / Corrosion Science 61 (2012) 185–207 
AZ91 0.1 M Na2SO4 

R(RC)(QR(RL))

R(RC)(RC)

R(RC)(RCR(Q(RL))) 

3 (1h), 1 (10d)-0.6(20d) kΩ /cm2  J. Chen et al. / Electrochimica Acta 52 (2007) 3299–3309