Rave About Your Rack Please do not post retail SPAM.

Topic	Date	User
Carabiner Corrosion	22-Jun-2004 At 2:42:37 PM	The Blond Gecko
Message
Well, there's your problem. You don't need any strange minerals in the cave, just a bit of salt water. Aluminium has a higher electrode potential than zinc, so just like with chrome over steel, if you scratch it the aluminium will start to corrode in preference to the zinc. The salt has a dual role - providing a conductive path to complete the circuit, and breaking up the oxide layers on the zinc and aluminium to allow the corrosion to penetrate.

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