期刊
PROTECTION OF METALS AND PHYSICAL CHEMISTRY OF SURFACES
卷 58, 期 4, 页码 801-810出版社
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S2070205122040141
关键词
corrosion; inhibitors; pitting; cerium; lanthanides; passive
资金
- Fondo Sectorial CONACYT-SENER Sustentabilidad Energetica [207450]
- Centro Mexicano de Innovacion en Energia Solar (CeMIESol)
- National Council of Science and Technology CONACYT (Mexico), through the National Laboratory of Graphenic Materials grant
- CONACYT [315878]
- World Bank [002/2017-PRODETES-PLATA]
- SENER [002/2017-PRODETES-PLATA]
Corrosion is a major issue in materials science, and rare earth elements are considered as excellent corrosion inhibitors due to their environmental friendliness and effective protection mechanism. Among them, cerium has been extensively studied and shows promising potential in corrosion protection due to its abundance, low cost, and self-healing coatings.
Corrosion is one of the main problems in materials science that represents a high cost to the world economy. Rare earth elements have attracted attention as corrosion inhibitors due to their excellent results and being environmentally friendly. Although its mechanism of action continues to be studied, the most accepted theory indicates that corrosion inhibition is based on the formation of insoluble oxides/hydroxides and requires specific conditions to be effective, which represents a problem in some applications. In recent years, various lanthanide salts have been investigated, their corrosion protection mechanism being widely reported, and the operation principle is the same for all rare earth elements. Cerium is the element that has been most extensively investigated among them, mainly for its abundance, low cost, favorable results attributed to the formation of oxides/hydroxides that block cathodic sites, and, in recent years, to developing coatings capable of self-healing. Despite not having reached extensive applications in real cases of protection against corrosion, the prospects of rare earth salts as corrosion inhibitors are promising and appear as a viable option for replacing processes involving chromium.
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