The formation of corrosion products with time on zinc anode reduced the voltage and current in galvanic cell considerable and anode film
layer of considerable increase.
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No such vertical cracking and delamination were observed in the anode film
. The distance between individual vertical cracks was on the order of several mm.
iv) High levels of chloride, usually denoted by a light grey to white anode film
. Confirm by solution analysis.
* A lack of free cyanide can result in black or green anode film
anode polarisation or blue tint to the solution.