Studies on Corrosion Behavior of Mg-Al-Zn-RE Cast Alloy with Powder-Coated Al and CED Mg by Salt Spray Test, Immersion Test, and Electrochemical Test

Table 7

Corrosion rate of AZ91D samples.

AZ91D	24 h (mm/year)	48 h (mm/year)	72 h (mm/year)	96 h (mm/year)	120 h (mm/year)
As cast sample	38.67	43.29	43.10	42.17	42.31
Powder-coated sample	3.75	3.71	4.47	3.98	4.22
CED-coated sample	1.33	1.19	1.10	1.12	1.13