TY - GEN
T1 - Corrosion evaluation of NiCrAlCoY coating applying electrochemical noise and lineal polarization resistance techniques
AU - Trujillo Estrada, A.
AU - Cuevas Arteaga, C.
AU - Porcayo Calderón, J.
PY - 2011
Y1 - 2011
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84879437672&partnerID=8YFLogxK
U2 - 10.1149/1.3660603
DO - 10.1149/1.3660603
M3 - Contribución a la conferencia
AN - SCOPUS:84879437672
SN - 9781607682981
T3 - ECS Transactions
SP - 101
EP - 110
BT - MES 2011
PB - Electrochemical Society Inc.
T2 - 26th National Meeting of the Mexican Electrochemical Society, MES 2011 and the 4th Meeting of the ECS Mexican Section - 220th ECS Meeting
Y2 - 29 May 2011 through 3 June 2011
ER -