Role of calcium acid phosphate as corrosion inhibitive pigment

Chromate based anticorrosive pigments are gradually being replaced because of their toxicity and carcinogenic properties. Zinc phosphate has been used to replace chromates but has led to contradictory results, its main difficulty being low solubility. Calcium acid phosphate, which has a higher solub...

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Autores principales: Vetere, Vicente Francisco, Romagnoli, Roberto
Formato: Articulo
Lenguaje:Inglés
Publicado: 1994
Materias:
Química
Corrosion
calcium
paints
pigments
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/175522
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-175522
record_format dspace
spelling I19-R120-10915-1755222024-12-29T04:18:47Z http://sedici.unlp.edu.ar/handle/10915/175522 Role of calcium acid phosphate as corrosion inhibitive pigment Vetere, Vicente Francisco Romagnoli, Roberto 1994 2024-12-27T13:54:05Z en Química Corrosion calcium paints pigments Chromate based anticorrosive pigments are gradually being replaced because of their toxicity and carcinogenic properties. Zinc phosphate has been used to replace chromates but has led to contradictory results, its main difficulty being low solubility. Calcium acid phosphate, which has a higher solubility, could replace zinc phosphate. Evaluations of the degree of rusting on painted panels, corrosion rate measurements, and electrochemical studies ( corrosion potential measurements and polarisation curves) have shown that calcium acid phosphate is better than zinc phosphate and is comparable to zinc tetroxychromate as an anticorrosive pigment in a phenolic chlorinated rubber binder. An advantage from an ecological point of view is that calcium ions provide less contamination than zinc ions. Centro de Investigación y Desarrollo en Tecnología de Pinturas Articulo Articulo http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf 115-119
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Química
Corrosion
calcium
paints
pigments
spellingShingle Química
Corrosion
calcium
paints
pigments
Vetere, Vicente Francisco
Romagnoli, Roberto
Role of calcium acid phosphate as corrosion inhibitive pigment
topic_facet Química
Corrosion
calcium
paints
pigments
description Chromate based anticorrosive pigments are gradually being replaced because of their toxicity and carcinogenic properties. Zinc phosphate has been used to replace chromates but has led to contradictory results, its main difficulty being low solubility. Calcium acid phosphate, which has a higher solubility, could replace zinc phosphate. Evaluations of the degree of rusting on painted panels, corrosion rate measurements, and electrochemical studies ( corrosion potential measurements and polarisation curves) have shown that calcium acid phosphate is better than zinc phosphate and is comparable to zinc tetroxychromate as an anticorrosive pigment in a phenolic chlorinated rubber binder. An advantage from an ecological point of view is that calcium ions provide less contamination than zinc ions.
format Articulo
Articulo
author Vetere, Vicente Francisco
Romagnoli, Roberto
author_facet Vetere, Vicente Francisco
Romagnoli, Roberto
author_sort Vetere, Vicente Francisco
title Role of calcium acid phosphate as corrosion inhibitive pigment
title_short Role of calcium acid phosphate as corrosion inhibitive pigment
title_full Role of calcium acid phosphate as corrosion inhibitive pigment
title_fullStr Role of calcium acid phosphate as corrosion inhibitive pigment
title_full_unstemmed Role of calcium acid phosphate as corrosion inhibitive pigment
title_sort role of calcium acid phosphate as corrosion inhibitive pigment
publishDate 1994
url http://sedici.unlp.edu.ar/handle/10915/175522
work_keys_str_mv AT veterevicentefrancisco roleofcalciumacidphosphateascorrosioninhibitivepigment
AT romagnoliroberto roleofcalciumacidphosphateascorrosioninhibitivepigment
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