Relationship Between Microstructure and Marine Corrosion Resistance of Martensitic Stainless Steels: A Multiscale Approach

Reilhac, P. Roux de; Creus, Juan; Feaugas, X.; Michel, Grégory; Frappart, S.; Branger, V.

doi:10.1007/s11665-019-04121-z

Cited by 5 publications

(1 citation statement)

References 49 publications

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“…Martensitic stainless steel (MSS), a kind of strong and ductile material, is widely used in parts, such as exhaust passages around aeroengines and rocket fuel storage tanks, because of its high strength, good corrosion resistance, and oxidation resistance. [1][2][3][4]. However, due to the increasing demands of the energy industry in recent years, aeroengines could be eroded by oxidation and corroded by hot-salt mixtures when used in marine atmospheric environments, resulting in a significant reduction in the thermal stability and corrosion resistance of MSS.…”

Section: Introductionmentioning

confidence: 99%

Understanding the Role of a Cr Transition Layer in the Hot-Salt Corrosion Behavior of an AlSi Alloy Coating

Liu

Chen

et al. 2022

Coatings

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The effect of a chromium (Cr) transition layer on the hot-salt corrosion behavior of an AlSi alloy coating was studied. Hot-salt corrosion experiments were performed at 650 °C and corrosion kinetic curves were plotted. The weight gain of the AlSi-coated samples increased to 0.89 mg/cm2 at 100 h and then decreased steadily to 0.77 mg/cm2 at 200 h. The weight of the AlSi-coated samples with the addition of a Cr transition layer increased immediately to 0.79 mg/cm2 at 20 h and then gradually increased to 0.85 mg/cm2 at 200 h. This Cr diffusion promoted the preferential creation of an Al2O3 layer, which effectively hindered the upward diffusion of Fe and also resulted in the production of a Cr2O3-SiO2 layer, which impeded the multi-scale salt mixture’s penetration. The Cr diffusion also caused a notable seal-healing effect, which healed the micro-pores. These oxidation and degradation reactions were considerably repressed by the high barrier properties of these oxide layers and the dense surface, resulting in the increased hot-salt corrosion resistance of the AlSi alloy coating. The current findings provide a feasible strategy for the design of a diffusion barrier layer of a thermal protective coating on martensitic stainless steel.

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Section: Introductionmentioning

confidence: 99%