The corrosion resistances of a number of tempered states of two Cr-Mo low-alloy steels, the novel “HT10″ (martensitic) and the commercial ASTM A182 grade “F22″ (bainitic), were evaluated in CO 2 -saturated brine. The tempering heat treatments soften both steels, due to a decrease in dislocation density, and the precipitation of alloy carbides, but also decrease their uniform corrosion rates. Such a decrease is considerable if the steels are tempered at higher temperature for longer time. For the novel HT10, we discuss how the tempering-induced changes to the microstructure contribute to decreasing the cathodic reaction kinetics, and thus the general corrosion rate.
CITATION STYLE
Escrivà-Cerdán, C., Ooi, S. W., Joshi, G. R., Morana, R., Bhadeshia, H. K. D. H., & Akid, R. (2019). Effect of tempering heat treatment on the CO 2 corrosion resistance of quench-hardened Cr-Mo low-alloy steels for oil and gas applications. Corrosion Science, 154, 36–48. https://doi.org/10.1016/j.corsci.2019.03.036
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