This study deals with the corrosion behaviour of high-pressure cold-sprayed Ta coatings, compared with Tabulk material and inert-atmosphere plasma-sprayed Ta coatings. Electrochemical polarization andelectrochemical impedance spectroscopy measurements are carried out in 1 M KOH solution; immersiontests are performed in 1 wt.% HF solution, and the resistance to high-temperature oxidation and molten saltattack is evaluated by hot corrosion tests. Moreover, the effect of substrate material (steel, Al and Cu) on thecoating formation is investigated using FESEM.
Corrosion resistance of cold-sprayed Ta coatings in very aggressive conditions / Bolelli, Giovanni; Lusvarghi, Luca; H., Koivuluoto; P., Vuoristo; F., Casadei. - In: SURFACE & COATINGS TECHNOLOGY. - ISSN 0257-8972. - STAMPA. - 205:(2010), pp. 1103-1107. [10.1016/j.surfcoat.2010.02.052]
Corrosion resistance of cold-sprayed Ta coatings in very aggressive conditions
BOLELLI, Giovanni;LUSVARGHI, Luca;
2010
Abstract
This study deals with the corrosion behaviour of high-pressure cold-sprayed Ta coatings, compared with Tabulk material and inert-atmosphere plasma-sprayed Ta coatings. Electrochemical polarization andelectrochemical impedance spectroscopy measurements are carried out in 1 M KOH solution; immersiontests are performed in 1 wt.% HF solution, and the resistance to high-temperature oxidation and molten saltattack is evaluated by hot corrosion tests. Moreover, the effect of substrate material (steel, Al and Cu) on thecoating formation is investigated using FESEM.
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