Electrochemical Impedance Study of Zinc Yellow Polypropylene-Coated Aluminum Alloy

Table 1

Chemical composition of 7B04 Aluminum alloy (wt.%).

Material	Al	Zn	Mg	Cu	Mn	Cr	Fe	Si
7B04	bal	5.0~6.5	1.8~2.8	1.4~2.0	0.2~0.6	0.1~0.25	0.05~0.25	0.1