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Home  > Raw materials & technologies  > Applications  > Protective & Marine coatings  > Microencapsulation of quinoline as corrosi...

Tuesday, 24 September 2019
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Raw materials & technologies, Applications, Protective & Marine coatings

Microencapsulation of quinoline as corrosion inhibitor in polyurethane coatings

Thursday, 3 December 2015

The aim of a study was to encapsulate quinoline, a corrosion inhibitor, into a micro-reservoir to overcome disadvantages caused by its direct addition into a coating layer.

Researchers synthesised polyurea microcapsules containing quinoline as a corrosion inhibitor. Source: pixelmax/pixelio.de

Researchers synthesised polyurea microcapsules containing quinoline as a corrosion inhibitor. Source: pixelmax/pixelio.de

The use of reservoirs containing corrosion inhibitors as active substances for corrosion protection is an issue of great interest in the scientific literature.

Synthesised at room temperature

Quinoline incorporated microcapsules with different core solvents were synthesised at room temperature by an interfacial polymerisation method. The morphologies, wall structures, particle size and thermal properties of the synthesised microcapsules were investigated. The release study of core material was carried out by loss on drying and UV spectrophotometric methods.

Microcapsules exhibit good thermal stability

The prepared quinoline based microcapsules were incorporated in polyurethane (PU) coatings to study their effect on corrosion of substrate. The anticorrosive performance of coatings loaded with different weight % of microcapsules containing quinoline was tested by immersion of the PU coated mild steel specimens in 5 wt% HCl solution by visual observation and weight loss measurements.

The study is publidhed in: Progress in Organic Coatings, Volume 83, June 2015, Pages 11-18.

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