A sequential dual-passivation strategy for designing stainless steel used above water oxidation

Yu，Kaiping1,2; Feng，Shihui2; Ding，Chao2; Gu，Meng2; Yu，Peng2; Huang，Mingxin1

2023

10.1016/j.mattod.2023.07.022

Materials Today   Impact Factor & Quartile

1369-7021

1873-4103

Stainless steel is critical material used in a wide variety of industries. Unfortunately, current development of stainless steel has reached a stagnant stage due to the fundamental limitation of the conventional Cr-based single-passivation mechanism. Here, we show that, by using a sequential dual-passivation mechanism, substantially enhanced anti-corrosion properties can be achieved in Mn-contained stainless steel, with a high breakdown potential of ∼1700 mV (saturated calomel electrode, SCE) in a 3.5 wt% NaCl solution. Specifically, the conventional Cr-based and counter-intuitive Mn-based passivation is sequentially activated during potentiodynamic polarization. The Cr-based passive layer prevents corrosion at low potentials below ∼720 mV(SCE), while the Mn-based passive layer resists corrosion at high potentials up to ∼1700 mV(SCE). The present “sequential dual-passivation” strategy enlarges the passive region of stainless steel to high potentials above water oxidation, enabling them as potential anodic materials for green hydrogen production via water electrolysis.

Anti-corrosion Sequential dual-passivation Stainless steel Water electrolysis

English

Others

National Key Research and Development Program of China[2019YFA0209900];Guangdong Innovative and Entrepreneurial Research Team Program[2019ZT08C044];National Natural Science Foundation of China[U1764252];

2-s2.0-85168462775

Scopus

1.Department of Mechanical Engineering,The University of Hong Kong,Hong Kong,Pokfulam Road,Hong Kong
2.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,Xue Yuan Road 1088,China

Yu，Kaiping,Feng，Shihui,Ding，Chao,et al. A sequential dual-passivation strategy for designing stainless steel used above water oxidation[J]. Materials Today,2023.

Yu，Kaiping,Feng，Shihui,Ding，Chao,Gu，Meng,Yu，Peng,&Huang，Mingxin.(2023).A sequential dual-passivation strategy for designing stainless steel used above water oxidation.Materials Today.

Yu，Kaiping,et al."A sequential dual-passivation strategy for designing stainless steel used above water oxidation".Materials Today (2023).