Tampere University of Technology

TUTCRIS Research Portal

Chlorine induced high temperature corrosion resistance of Cr3C2-based HVOF and HVAF thermally sprayed coatings

Research output: Contribution to journalArticleScientificpeer-review


Original languageEnglish
Article number108166
JournalCorrosion Science
Publication statusE-pub ahead of print - 2019
Publication typeA1 Journal article-refereed


A novel method that combines thermal analysis and traditional furnace corrosion tests was used to study the corrosion behaviour of thermally sprayed Cr3C2-based hardmetal coatings at 450 °C and 550 °C under a KCl deposit. This method enabled the identification of the onset temperature of chlorine-induced oxidation to be within 450–500 °C. Two corrosion mechanisms were suggested for these temperatures. At 450 °C, the corrosion rate was slow and mainly controlled by the formation of K2CrO4. Exposure at 550 °C caused the formation of fine interconnected secondary-carbide precipitates in the metal matrix. Their fast corrosion was identified as the major cause of degradation.

Publication forum classification

Field of science, Statistics Finland