Re: Failure of low-temp metal spray coating

Posted by Gordon England on April 25, 2003 at 01:56:27:

In Reply to: Failure of low-temp metal spray coating posted by Isaac on April 21, 2003 at 07:56:36:

: Hi,

: I would appreciate if I could have any information on the possible failures of Al-Zn coating in seawater environment...currently doing a project to understand such pre-mature failures.

: Does the sealant actually degrades the corrosion resistance of the coatings?

: Thanks!

Hi Isaac

Premature failures could result from poor procedures in application of the coating system or placing the coating in environments of high wear/erosion/mechanical abuse or extreme bimetallic connections.

Sealing the coating will increase the corrosion resistance of the coating, but may reduce it's sacificial potential to protect areas of exposed substrate.

Regards Gordon

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