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Authors = Rin Takada

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12 pages, 7729 KiB  
Article
Self-Healing Coatings Consisting of an Outer Electrodeposited Epoxy Resin Layer and an Inner Porous Anodic Oxide Layer with Healing Agents for the Corrosion Protection of Al Alloys
by Rin Takada, Kota Hirasawa, Hideaki Takahashi and Makoto Chiba
Corros. Mater. Degrad. 2023, 4(3), 516-527; https://doi.org/10.3390/cmd4030027 - 18 Sep 2023
Cited by 2 | Viewed by 2178
Abstract
Recently, new surface treatments for the corrosion protection of Al alloys by forming self-healing layers have attracted the attention of many researchers. The authors of this paper have previously developed self-healing polyurethane coatings with micro-capsules containing healing agents and porous anodic oxide films [...] Read more.
Recently, new surface treatments for the corrosion protection of Al alloys by forming self-healing layers have attracted the attention of many researchers. The authors of this paper have previously developed self-healing polyurethane coatings with micro-capsules containing healing agents and porous anodic oxide films filled with healing agents. In this study, self-healing coatings consisting of an outer electrodeposited epoxy resin layer and an inner porous anodic oxide layer with healing agents were developed for the corrosion protection of Al alloys. The corrosion protection abilities of the self-healing coating were shown in Cu2+/Cl solutions after damaging with indenters and were affected by freezing treatments and the tip angles of the indenter. Full article
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13 pages, 6704 KiB  
Article
Formation of Self-Healing Organic Coatings for Corrosion Protection of Al Alloys by Dispersion of Spherical and Fibrous Capsules
by Makoto Chiba, Yuki Tsuji, Rin Takada, Yuri Eguchi and Hideaki Takahashi
Materials 2023, 16(8), 3018; https://doi.org/10.3390/ma16083018 - 11 Apr 2023
Cited by 5 | Viewed by 5178
Abstract
In previous works, we developed a self-healing organic coating with dispersed spherical capsules for corrosion protection. The capsule consisted of a polyurethane shell and healing agent as the inner. When the coating was damaged physically, the capsules were broken, and the healing agent [...] Read more.
In previous works, we developed a self-healing organic coating with dispersed spherical capsules for corrosion protection. The capsule consisted of a polyurethane shell and healing agent as the inner. When the coating was damaged physically, the capsules were broken, and the healing agent was released from the broken capsules to the damaged area. The healing agent could react with moisture in the air to form the self-healing structure and cover the damaged area of coating. In the present investigation, a self-healing organic coating with spherical and fibrous capsules was formed on aluminum alloys. The corrosion behavior of the specimen coated with the self-healing coating was examined in a Cu2+/Cl solution after physical damage, and it was found that no corrosion occurred during the corrosion test. This is discussed in terms of the high healing ability of fibrous capsules as a result of the high projected area. Full article
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