Alodine 1200

[marulanda]

I'm not an expert of corrosion, so I've some question about this surface treatment:
I would like to use Alodine 1200 to protect an aluminium alloy (6082-T6) structure that cannot present corrosion for the first 5-6 years of its life. The structure is located in urban environment, Is a good protection for my application?
I cannot use anodizing.

Generally How many years live an alluminium alloy structure with Alodine 1200 in inurban environment before starting the corrosion phenomena?

Regards.

 

[TVP]

If the aluminum is not in contact with steel, stainless steel, or another metal that is galvanically more noble, then this alloy and coating combination should be ok for 5-6 years. A general urban environment is not very aggressive for even bare aluminum. Things like acid rain, animal waste excretions, and other non-equilibrium conditions can change this, though.