COLD GALVANIZING
CATHODIC PROTECTION

Questions ?
Le sujet

Cold galvanizing VS hot dip galvanizing

Yes, the cold galvanizing acts as hot dip galvanizing. The surface will show a white-grey powder containing zinc salts and zinc carbonates. This will cause a consumption of the zinc layer.
The "corrosion" speed of this will determine the lifetime expectation of this cathodic protection.

on Monday May 13 by M4nd3
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The hardness of steel is about 160Vickers, zinc (and cold galva) is about 70Vickers and the hot-dip layer alloy has a delta layer of 10μm with a hardness of about 240Vickers.
This means that the very hard hot dip layer is very hard and brittle. This can cause hidden corrosion problems this is not the case with the cold galva application.

on Monday May 13 by M4nd3
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The lower price and the facility to apply it in the paint work shop without the inconvenience of the (thermal) problems of the hot-dip bath with restrictions on the dimensions and shape of the steel elements.
With the cold galvanization, applications in situ are possible

on Monday May 13 by M4nd3
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