| Titre : |
Cost-effective pigmentation in alkyd primers for steel : barrier anti-corrosion mechanism |
| Type de document : |
texte imprimé |
| Auteurs : |
William C. Johnson, Auteur |
| Année de publication : |
1994 |
| Article en page(s) : |
p. 47-54 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Anticorrosion
Coût -- Contrôle
Formulation (Génie chimique)
Métaux -- Revêtements protecteurs
Oxyde de plomb
Oxyde de zinc
Pigments inorganiques
Polyalkydes
Primaire (revêtement)
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
A major cost of alkyd primers for the protection of steel is the chemically active pigment. A low concentration of a pigment sufficient to just neutralize the acids that are formed during the drying process produces soaps and salts and eliminates chemically active acids and alkalis. Thus, barrier properties of the binder are secured. This reduces the raw material cost and increases the protection. A review of collected literature on the chemistry of alkyd primers and on exposure studies provides an understanding of barrier protection as related to alkyd primers. Formulating practices for alkyd primers to obtain superior protection at low cost are explained. |
| Note de contenu : |
- INTRODUCTION : Definitions - Background
- PART I-COMPARATIVE EXPOSURE RESULTS : Earliest alkyd barrier formulation - Zinc oxide and red lead concentration ladders - SSPC PACE program 1
- PART II-CHEMISTRY, FORMULATION, AND COSTS : Unique chemistry of alkyd and drying oil cure - Formulating principles and practices - Savings in cost with barrier formulation
- DISCUSSION : Neutralization |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18624 |
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 66, N° 831 (04/1994) . - p. 47-54
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