Painting Zinc and Zinc Alloy Surfaces

Nelson, Harley A.

doi:10.1021/ie50310a018

Cited by 3 publications

(2 citation statements)

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“…A number of different theories have been advanced to explain the loss of adhesion of paint to zinc surfaces. The theory which has been tacitly accepted by the trade is that the zinc surface is too smooth and that, if it were rougher, better adhesion would be attained (12). A second explanation, which has received less support in practice, assumes that the lack of adhesion is due to the formation of a compound at the interface between zinc and the coating (4).…”

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Reaction between Paint Films and Zinc Surfaces

Wing¹

1936

Ind. Eng. Chem.

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The failure of paints to adhere properly to zinc or galvanized surfaces may be due to a combination of causes.It has been assumed that one of the possible causes was reaction between the decomposition products, formed in the drying of the paint film, and the zinc surface, producing compounds at the interface which destroyed adhesion.This study has shown definitely that reactions can take place between zinc and the oxidation products formed in the drying of oil or varnish type finishes, and that compounds formed as a result of this reaction are actually present on paint films which peel from galvanized surfaces. Zinc formate has been definitely identified as one of these compounds.

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“…A second explanation, which has received less support in practice, assumes that the lack of adhesion is due to the formation of a compound at the interface between zinc and the coating (4). A third explanation is that the zinc destroys the normal orientation of the molecules toward the metal surface with a resultant loss in adhesion (12).…”

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confidence: 99%