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Dunois coating and organic sealant

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Posted by jean claude Morizot on July 28, 2003 at 17:23:52:

Hello,

I use thermal sprayed 85/15 ZnAl alloy commercialy known as Dunois to protect stell toggles used in underground structure contruction when agressive soil conditions (high suphate and chloride content, sea water, 30 C temperature.....)are encoutered.

Is it wise to add a sealant to Dunois coating ?
Shall we actually observe a better durability of the anodic protection ?
What type of sealant is recommended ?
Is there any drawback ? what is happening when the scrificial anode coating is locally consumed ? Risk of local fast corrosion ?

Thank you for your help

JCM

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Re: Dunois coating and organic sealant Gordon England 12:25:10 08/05/03(0)

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