Corrosion evaluation of NiCrAlCoY coating applying electrochemical noise and lineal polarization resistance techniques

A. Trujillo Estrada, C. Cuevas Arteaga, J. Porcayo Calderón

Producción científica: Capítulo del libro/informe/acta de congresoContribución a la conferenciarevisión exhaustiva

2 Citas (Scopus)

Resumen

A corrosion study of NiCrAlCoY thermal flame spray coating on stainless steel exposed to LiBr-H2O (wt. 50%) at 25 and 70°C during 10 days is presented. The electrochemical noise (EN) technique and lineal polarization resistance (LPR) were applied. NiCrAlCoY coating was tested as sprayed condition and polished condition. These two different conditions were chosen in order to determine the effect of porosity and homogeneity of the surface. The resistance noise (Rn) was determined from the EN measurements, which was compared to LPR, observing that Rn and LPR were alike, observing that the results by EN reflected the localized events suffered by the coating. Considering that the corrosion resistance is the inverse of the corrosion rate, it is stated that at 25°C the corrosion rate was higher in the polished condition coatings. In general, the passive layer formed after spraying protects the coating generating lower corrosion rates at both temperatures.

Idioma originalInglés
Título de la publicación alojadaMES 2011
Subtítulo de la publicación alojadaElectrochemistry as a Tool for Sustainable Development
EditorialElectrochemical Society Inc.
Páginas101-110
Número de páginas10
Edición1
ISBN (versión digital)9781566779401
ISBN (versión impresa)9781607682981
DOI
EstadoPublicada - 2011
Evento26th National Meeting of the Mexican Electrochemical Society, MES 2011 and the 4th Meeting of the ECS Mexican Section - 220th ECS Meeting - Mexico City, México
Duración: 29 may. 20113 jun. 2011

Serie de la publicación

NombreECS Transactions
Número1
Volumen36
ISSN (versión impresa)1938-5862
ISSN (versión digital)1938-6737

Conferencia

Conferencia26th National Meeting of the Mexican Electrochemical Society, MES 2011 and the 4th Meeting of the ECS Mexican Section - 220th ECS Meeting
País/TerritorioMéxico
CiudadMexico City
Período29/05/113/06/11

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