A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Corrosion behavior of 700 MPa grade weathering steel with 4.0 wt% Ni and 5.0 wt% Cr in simulated marine atmospheric environment
Abstract The dry-wet cycle corrosion behavior of low alloy steel (Q355B) and 700 MPa grade Ni, Cr composite weathering steel (4 wt% Ni-5 wt% Cr) in 2 wt% NaCl solutions was studied. The distribution characteristics of elements and phases in the corrosion products after 360 h corrosion cycle were analyzed by SEM and Raman spectroscopy. The formation mechanism of protective rust layer of Ni, Cr composite weathering steel in simulated marine environment was briefly described. The results show that the corrosion products of Q355B appear obvious stratification, and the rust layer of Ni, Cr composite weathering steel has no longer stratified. The Ni, Cr composite weathering steel forms a cationic selective rust layer during the corrosion process, which effectively prevents the penetration of Cl- and exhibits excellent corrosion resistance, the corrosion rate of Ni, Cr composite weathering steel after 72 h-360 h corrosion cycle is 1/8–1/3 of that of Q355B. The value of α/γ * increases with the extension of corrosion cycle, which is reach to 1.0 after 360 h corrosion cycle. The corrosion potential increases with the extension of corrosion cycle, the corrosion current density fluctuates slightly around 100 × 10−6 A/cm2.
Highlights 700 MPa grade weathering steel was obtained by adding Ni and Cr elements, the corrosion rate of Ni, Cr composite weathering steel after 72 h corrosion cycle is 1/8 of that of low alloy steel. The rust layer structure and phase composition of low alloy steel and Ni, Cr composite weathering steel were characterized in detail. During the corrosion process, the rust layer of Ni, Cr composite weathering steel showed obvious cation selectivity, forming a cation selective rust layer, effectively repel Cl-, so that a few Cl- exists in the corrosion products. The formation mechanism of protective rust layer of Ni, Cr composite weathering steel in simulated marine environment was described.
Corrosion behavior of 700 MPa grade weathering steel with 4.0 wt% Ni and 5.0 wt% Cr in simulated marine atmospheric environment
Abstract The dry-wet cycle corrosion behavior of low alloy steel (Q355B) and 700 MPa grade Ni, Cr composite weathering steel (4 wt% Ni-5 wt% Cr) in 2 wt% NaCl solutions was studied. The distribution characteristics of elements and phases in the corrosion products after 360 h corrosion cycle were analyzed by SEM and Raman spectroscopy. The formation mechanism of protective rust layer of Ni, Cr composite weathering steel in simulated marine environment was briefly described. The results show that the corrosion products of Q355B appear obvious stratification, and the rust layer of Ni, Cr composite weathering steel has no longer stratified. The Ni, Cr composite weathering steel forms a cationic selective rust layer during the corrosion process, which effectively prevents the penetration of Cl- and exhibits excellent corrosion resistance, the corrosion rate of Ni, Cr composite weathering steel after 72 h-360 h corrosion cycle is 1/8–1/3 of that of Q355B. The value of α/γ * increases with the extension of corrosion cycle, which is reach to 1.0 after 360 h corrosion cycle. The corrosion potential increases with the extension of corrosion cycle, the corrosion current density fluctuates slightly around 100 × 10−6 A/cm2.
Highlights 700 MPa grade weathering steel was obtained by adding Ni and Cr elements, the corrosion rate of Ni, Cr composite weathering steel after 72 h corrosion cycle is 1/8 of that of low alloy steel. The rust layer structure and phase composition of low alloy steel and Ni, Cr composite weathering steel were characterized in detail. During the corrosion process, the rust layer of Ni, Cr composite weathering steel showed obvious cation selectivity, forming a cation selective rust layer, effectively repel Cl-, so that a few Cl- exists in the corrosion products. The formation mechanism of protective rust layer of Ni, Cr composite weathering steel in simulated marine environment was described.
Corrosion behavior of 700 MPa grade weathering steel with 4.0 wt% Ni and 5.0 wt% Cr in simulated marine atmospheric environment
Da, Guangjie (author) / Yang, Zhongmin (author) / Yang, Shanwu (author) / Chen, Ying (author) / Li, Zhaodong (author) / Wang, Changsheng (author) / Xiao, Lijun (author) / Zhang, Zhongfeng (author)
2023-12-25
Article (Journal)
Electronic Resource
English
Corrosion behavior of nickel-containing weathering steel in simulated marine atmospheric environment
| British Library Online Contents | 2014
| British Library Online Contents | 2017
Corrosion Behavior of Q235 Steel and Weathering Steel in Simulated Marine Industry Atmosphere
| British Library Online Contents | 2015