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Sunday, 22 September 2019
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Raw materials & technologies, Applications, Protective & Marine coatings

Chalcogenides effect anticorrosive properties of protective coatings

Thursday, 3 July 2014

The objective of a study carried out by Czech researchers concerns reduction of zinc metal content in organic coatings while preserving their high anticorrosive efficiency.

Chalcogenides can improve anticorrosive properties of coatings Source: Sasha Radosavljevic - Fotolia.com

Chalcogenides can improve anticorrosive properties of coatings Source: Sasha Radosavljevic - Fotolia.com

The two goals can be achieved by using amorphous chalcogenides as components of the protective coating. Special attention was paid to materials containing Ge20Se80, Ge30Se70 and Ge40Se60, which were characterised by physico-chemical properties.

Chalcogenides improve corrosion resistance

An epoxy ester resin was used as binder for the investigated organic coatings. Organic coatings were prepared by combining zinc metal with amorphous chalcogenides. The resistance of the prepared films was evaluated using the results of mechanical tests. The anticorrosive efficiency of the prepared films was evaluated using the results of direct corrosion tests. Thus the following conclusion can be made from the results of anti-corrosive tests: the higher the pigment volume concentration of amorphous chalcogenides in the coatings, the better the protective performance of the paint against corrosion.

The study is published in: Progress in Organic Coatings, Volume 77, Issue 9, September 2014, Pages 1369-1375.

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