Self‐healing properties of TiO 2  particle–polymer composite coatings for protection of aluminum alloys against corrosion in seawater | Zendy

Yabuki A. | Zendy; Urushihara W. | Zendy; Kinugasa J. | Zendy; Sugano K. | Zendy

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Self‐healing properties of TiO 2 particle–polymer composite coatings for protection of aluminum alloys against corrosion in seawater

Author(s) -

Yabuki A.,

Urushihara W.,

Kinugasa J.,

Sugano K.

Publication year - 2011

Publication title -

materials and corrosion

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.487

H-Index - 55

eISSN - 1521-4176

pISSN - 0947-5117

DOI - 10.1002/maco.201005756

Subject(s) - materials science , corrosion , composite number , coating , polymer , composite material , aluminium , artificial seawater , dissolution , polarization (electrochemistry) , conversion coating , seawater , particle (ecology) , chemical engineering , metallurgy , chemistry , oceanography , engineering , geology

TiO 2 particle–polymer composite coatings were applied to the surface of a 5083 aluminum alloy. After using a knife to create an artificial defect, polarization resistance was monitored in artificial seawater at a temperature of 30 °C. The polarization resistance of the specimen coated with the composite polymer containing 3 vol% TiO 2 particles increased significantly over time, suggesting that the composite coating had self‐healing properties. A carbon‐containing 2‐µm thick film was found on the coated aluminum substrate at the site of the artificial defect. The formation of the film was related to the dissolution of bisphenol A (BPA), which is a chemical precursor of the polymer coating that behaved as an inhibiting agent.

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