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thanks u guys so much ^^. I did do this exp with different kinds of metal : aluminium, copper and zinc. Can s.o. tell me the risk assessment of these metals. Thanks

In my exp, i have to leave iron nail in saltwater.does it have any affect when i do cathodic protection in saltwater?

I got a prac assignment abt Shipwrecks, Corrosion and Conservation. This is abt i have to find different protections to coat iron nails to prevent corrosion. I have to do this prac at home and then give the result to teacher. I dunno what protection can i use (easy protection) so i can do it at...