| Titre : |
Defects on coated steel in CED coating |
| Type de document : |
texte imprimé |
| Auteurs : |
Shivam Madukar Tembelkar, Auteur |
| Année de publication : |
2022 |
| Article en page(s) : |
p. 55-60 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique.
L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1.
C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple.
Dépôt électrolytique
Métaux -- Revêtements
Revêtements -- Défauts:Peinture -- Défauts
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
In CED coating there are several type of defects. Cratering phenomenon in cathodic electrodeposition coating was investigated and the cratering mechanism was discussed. It occurs when part of the paint film undergoes a thermal change due to the spark discharge on the cathode. The thermal change generates nuclei that hinder the levelling of the deposited paint. Crawling, also called retraction or pulling back, is a uniform de-wetting effect : the surface energy of the solid substrate is lower than the surface tension of the liquid paint. Flooding is a film defect originating from the evaporation of solvents during film formation. Strong gradients in temperature and composition develop when the evaporation of solvents proceeds quickly. Foam bubbles can already be present in the paint before application starts. Foam can also be introduced during the application process; especially during brushing and spraying, air can be brought into the paint. Cracking is a process which occurs when a thin film on a substrate can break when the film suffers from stress. In coating technology breakage of a coating is called cracking. |
| Note de contenu : |
- EXPERIMENTAL : Steel sheet specimens - Electrodeposition coating method
- Crawling
- Cratering
- Flooding
- Foam
- Cracking
- Dirt : Barriers to curing defect problems
- Lack of adequate tests
- Unsual and/or severe contaminants : Non-technical barriers
- Lack of adequate training
- Figure : Line process of CED method |
| En ligne : |
https://drive.google.com/file/d/1IO41feC88QOnSbsuP8rYZ9wj1_0HS8bo/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37504 |
in PAINTINDIA > Vol. LXXII, N° 2 (02/2022) . - p. 55-60
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Defects on coated steel in CED coating in PAINTINDIA, Vol. LXXII, N° 2 (02/2022)
