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Abstract:

Purpose – To identify a method of evaluation as well as conditions under which corrosion in the form of flash rusting attacks steel treated with a coating of water-borne binders.

Design/methodology/approach – The paper worked with soluble alkaline silicates – sodium silicate – acting as flash rusting inhibitors, while aqueous dispersion binders were used in primer paints. Sodium silicate, potassium silicate and lithium silicate were studied from this point of view. Their inhibiting properties were described with the aid of a scanning method, determination of metal weight loss and electron raster microscopy.

Findings – Sodium silicate was identified as a very good flash rusting inhibitor for applications in styrene-acrylate water-borne paints.

Practical implications – Sodium silicate, potassium silicate and lithium silicate can be used in industrial coatings as high-performance inhibitors of flash rusting.

Originality/value – A coating containing corrosion defects occurring during the creation of a film loses its anticorrosion properties and provides only low anticorrosion protection against atmospheric corrosion when the film of coating is later exposed to a corrosion environment. This paper proved that silicates could be very efficient flash rusting inhibitors under certain conditions.

Keywords:

Coatings technology, Corrosion inhibitors, Nanotechnology, Rust, Silicates

Article Type:

Research paper

Article URL:

http://www.emeraldinsight.com/10.1108/00035590610650776

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