Corrosion inhibition of pre-formed mussel adhesive protein (Mefp-1) film to magnesium alloy. (March 2020)

• Record Type: Journal Article
• Authors: Hou, Rui-Qing; Zhang, Fan; Jiang, Ping-Li; Dong, Shi-Gang; Pan, Jin-Shan; Lin, Chang-Jian
• Is Part Of: Corrosion science. Volume 164(2020)
• Publication Date: 2020-03
• Subjects: Magnesium -- Mussel adhesive protein -- Scanning reference electrode technique -- EIS; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2019.108309
• Languages: English
• ISSNs: 0010-938X

Abstract

Highlights: A protective film was formed on Mg alloy surface by the self-absorption of Mefp-1 . Mefp-1 films can effectively inhibit the localized corrosion of Mg alloy. Mefp-1 film pre-formed at low pH imparts an increasing impedance resistance to Mg alloy. Abstract: A range of ex situ and in situ analytical techniques were applied to gain insights into the formation and properties of the pre-formed Mefp-1 film on magnesium-1.0 wt.% calcium (Mg-1.0Ca) alloy. The results revealed that the Mefp-1 film pre-formed at pH 4.6 shows a net-like structure, whereas it is more packed at pH 8.5. in situ scanning micro-reference electrode technique results demonstrated the Mefp-1 films formed at both pH can effectively inhibit the localised corrosion of Mg-1.0Ca alloy. Moreover, the film pre-formed at pH 4.6 provides an increasing corrosion inhibition to Mg-1.0Ca alloy during 7 days of exposure.