Self-Repairing Composites for Corrosion Protection: A Review on Recent Strategies and Evaluation Methods

The use of self-healing coatings to protect metal substrates, such as aluminum alloys, stainless steel, carbon steel, and Mg alloys from corrosion is an important aspect for protecting metals and for the economy. During the past decade, extensive transformations on self-healing strategies were intro...

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Bibliographic Details
Published in:Materials 2019-08, Vol.12 (17), p.2754
Main Authors: P, Poornima Vijayan, Al-Maadeed, Mariam
Format: Article
Language:English
Subjects:
Accelerated tests
Aluminum base alloys
Carbon steels
Cathodic protection
Cellulose fibers
Containers
Corrosion cell
Corrosion inhibitors
Corrosion prevention
Corrosion resistance
Electrochemical impedance spectroscopy
Immersion tests (corrosion)
Magnesium base alloys
Methods
Nanofibers
Polymers
Protective coatings
Review
Self healing materials
Stainless steels
Substrates
Tobacco
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Summary:The use of self-healing coatings to protect metal substrates, such as aluminum alloys, stainless steel, carbon steel, and Mg alloys from corrosion is an important aspect for protecting metals and for the economy. During the past decade, extensive transformations on self-healing strategies were introduced in protective coatings, including the use of green components. Scientists used extracts of henna leaves, aloe vera, tobacco, etc. as corrosion inhibitors, and cellulose nanofibers, hallyosite nanotubes, etc. as healing agent containers. This review gives a concise description on the need for self-healing protective coatings for metal parts, the latest extrinsic self-healing strategies, and the techniques used to follow-up the self-healing process to control the corrosion of metal substrates. Common techniques, such as accelerated salt immersion test and electrochemical impedance spectroscopy (EIS), for evaluating the self-healing process in protective coatings are explained. We also show recent advancements procedures, such as scanning vibrating electrode technique (SVET) and scanning electrochemical microscopy (SECM), as successful techniques in evaluating the self-healing process in protective coatings.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma12172754