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AssigneeUniversity of Science and Technology Beijing
InventorsZhiyong LIU, Xiaogang LI, Wei WU
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A binary alloy design method for a marine high-strength low-alloy (HSLA) stress corrosion-resistant steel is provided. The binary alloy design method permits synergistic inhibition of anodic dissolution and hydrogen embrittlement by binary alloying to prepare the marine HSLA stress corrosion-resistant steel, the marine HSLA stress corrosion-resistant steel has an increase of more than 50% in stress corrosion resistance in a simulated SO2 polluted marine atmospheric environment. Microalloying of one element is carried out to improve properties of a rust layer on a surface of a HSLA steel in a marine environment and reduce a electrochemical activity in a local microenvironment to inhibit the anodic dissolution. Microalloying of another element is carried out to reduce a cathodic hydrogen evolution, to increase a hydrogen trap density and to decrease a multiplicative hydrogen diffusion channel density as well as enhance a hydrogen resistance of a structure to inhibit the hydrogen embrittlement.
A binary alloy design method for a marine high-strength low-alloy (HSLA) stress corrosion-resistant steel, wherein a synergistic inhibition of an anodic dissolution and a hydrogen embrittlement is achieved by a binary alloying to prepare a 690 MPa marine HSLA stress corrosion-resistant steel, wherein the 690 MPa marine HSLA stress corrosion-resistant steel has an increase of more than 50% in a stress corrosion resistance in a simulated SO2 polluted marine atmospheric environment.
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