Effect of microstructure on corrosion behavior of high strength martensite steel—A literature review

Abstract

The high strength martensite steels are widely used in aerospace, ocean engineering, etc., due to their high strength, good ductility and acceptable corrosion resistance. This paper provides a review for the influence of microstructure on corrosion behavior of high strength martensite steels. Pitting is the most common corrosion type of high strength stainless steels, which always occurs at weak area of passive film such as inclusions, carbide/intermetallic interfaces. Meanwhile, the chromium carbide precipitations in the martensitic lath/prior austenite boundaries always result in intergranular corrosion. The precipitation, dislocation and grain/lath boundary are also used as crack nucleation and hydrogen traps, leading to hydrogen embrittlement and stress corrosion cracking for high strength martensite steels. Yet, the retained/reversed austenite has beneficial effects on the corrosion resistance and could reduce the sensitivity of stress corrosion cracking for high strength martensite steels. Finally, the corrosion mechanisms of additive manufacturing high strength steels and the ideas for designing new high strength martensite steel are explored.

DL‐EPR and AFM study of sensitization of a 17%Cr multiphase stainless steel

“…This result agrees with other studies in martensitic stainless steel. [14,[48][49][50][51] It follows a decrease of DOS with the increase of tempering temperature, which is typical of a healing process. The high Cr diffusivity in the martensite allows the reduction of Cr gradients, decreasing the DOS to a minimum value in specimen QT-600.…”

Hydrogen Embrittlement Evaluation and Prediction in Press‐Hardened Steels

“…[61,62] A micro-corrosion cell is formed during the pitting process, where the pit acts as an anode and the metal surface acts as the cathode. [63] Although the pitting corrosion occurs in a restricted area, it induces significant acidification accompanying highly concentrated hydrogen, thus being even more detrimental than uniform corrosion. Certain alloying elements, such as Cr, Mo, Si, and V, have been identified to impart high resistance to pitting corrosion in stainless steels and Fe-Cr alloys.…”

Effect of Dissolved CO2 on the Interaction of Stress and Corrosion for Pipeline Carbon Steels in Simulated Marine Environments

“…The variation in corrosion rates and morphologies observed on the exposed carbon steels is said to occur as a result of changes in the microstructure of the carbon steels and the presence of precipitates in their microstructures. The presence of precipitate in a microstructure provides nucleation sites for crack initiation and hydrogen traps, which can lead to hydrogen embrittlement and subsequent stress corrosion cracking [54]. The corrosion morphologies of the exposed X100 carbon steels in solution with CO 2 at 5 • C and 25 • C stressed at 80% Y.S., as shown in Figure 14a,b, respectively, presented much wider and deeper elliptical surface corrosion morphologies, which increased with increasing temperature from 5 • C to 25 • C. The variation in corrosion rates and morphologies observed on the exposed carbon steels is said to occur as a result of changes in the microstructure of the carbon steels and the presence of precipitates in their microstructures.…”