Anodized PV frames on copper roof in marine environment [RE-wrenches]

[Michael Welch, Home Power]

EH Roy wrote at 06:14 PM 02/21/2002 -0500:
  
>I'll be very surprised if aluminum module frames look new after 20 years.
>The advice I have been given is that anodizing will delay, not stop,
>corrosion of aluminum in marine environments (and not for 20 years); though
>once a patina of corrosion is formed on the surface that can help protect
>the rest of the aluminum underneath.

My un-garaged motorcycle's clear-anodized aluminum parts have been in coastal ocean air since I bought it in 1975. There is definitely corrosion, specially on the parts I over-buffed about 10 years ago. But the non-buffed anodized parts have only light corrosion, and none have significant damage, all is cosmetic and not ugly except from close up.

Now the formerly chrome parts on the other hand...
  
Michael Welch
  
------------------------
"In a nation of sheep, one brave man forms a majority."
			Edward Abbey
        
Michael Welch, michael.welch at homepower.com www.homepower.com
     Managing Editor, Home Power magazine
     Office Coordinator, Redwood Alliance
     (Not HP mag numbers) 707-822-7884 fax: 707-822-3481

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