744
High Temperature Electrochemical Evaluation of Ni Based Coatings Deposited by Laser Ablation
Among the wide variety of coating applications Laser Ablation [1,2], we can find an alternative for the lifetime of the materials used in aggressive media, such as molten salts which cause various damages and losses are substantially represented in the industry [3,4].
METHODOLOGY
SA213-T22 the steel is used as substrate for the deposition of coatings based Ni a shot blast treatment before the coating is applied leaving the surface to which this list to be anchored correctly. The electrochemical tests were done with a 3-electrode cell (RE, AE w1) [3] at two temperatures 25 ° and 700 ° C.
RESULTS
Figure 1 shows two linear polarization can be observed at a higher temperature than the corrosion rate decreases and the potential Icorr is more active presents.
CONCLUSIONS
The laser coatings represent an alternative to tackle the process of high temperature corrosion by molten salts as these may have greater strength than other materials.
Electrochemical techniques are a useful tool for assessing coatings by laser Ablation molten salt alternative.
REFERENCES
[1] Ferrari, B., R. Moreno, T. Benito, M. T. Larrea, and J. C. Fariñas. Revista de Metalurgia 34, no. Extra (1998): 22-26.
[2] M. Badrossamay, T.H.C. Childs, Volume 47, Issue 5, April 2007, Pages 779-784, ISSN 0890-6955
[3] Almeraya, F., A. Martinez-Villafañe, C. Gaona, M. A. Romero, and J. M. Malo. Revista de metalurgia 34, no. 1 (1998): 11-17.
[4] Tristancho, José Luis, Facundo Almeraya, and José Chacón. Scientia et Technica 3, no. 46 (2010): 163-167.