Mechanical Properties of Stainless-Clad Bimetallic Steel Bars with Different Corrosion Forms

HUA Jianmin; HU Guosong; WANG Fei; XUE Xuanyi; WANG Neng

doi:10.13204/j.gyjzG22112002

Volume 53 Issue 5

May 2023

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HUA Jianmin, HU Guosong, WANG Fei, XUE Xuanyi, WANG Neng. Mechanical Properties of Stainless-Clad Bimetallic Steel Bars with Different Corrosion Forms[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(5): 179-186. doi: 10.13204/j.gyjzG22112002

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Mechanical Properties of Stainless-Clad Bimetallic Steel Bars with Different Corrosion Forms

doi: 10.13204/j.gyjzG22112002

HUA Jianmin^1,2,
HU Guosong¹,
WANG Fei^{1
,
,},
XUE Xuanyi^1,2,
WANG Neng³

1. School of Civil Engineering, Chongqing University, Chongqing 400045, China;
2. Key Laboratory of New Technology for Construction of Cities in Mountain Area, Chongqing University, Chongqing 400045, China;
3. School of Management Science and Real Estate, Chongqing University, Chongqing 400045, China

Received Date: 2022-11-20

Abstract

Abstract

The stainless-clad bimetallic steel bar (SCBSB) is a new type of weather-resistant steel bar composed of carbon steel core bars and stainless-steel cladding. The metallurgical combination of the two is realized through hot rolling and other processes, so that it has both the strength of the core bar and the corrosion resistance of the cladding, which has broad prospects in practical engineering applications. Taking SCBSB which is consisted with the S304 stainless steel as the cladding and the HRB400 carbon steel bar as the substrate as the research object, according to the actual service state of reinforcement, three types of corrosion are designed, that’s, uniform corrosion, damaged cladding corrosion and non-uniform corrosion. Three types of corrosion forms of SCBSB samples were obtained by electrochemical accelerated corrosion test. Then the tensile test was performed on the above samples. The research had shown that the mechanical properties of SCBSB decreased linearly due to corrosion. The characteristic of stress-strain curve also changed after three forms of corrosion, of which the disappearance of the yield platform of the damaged cladding corrosion sample occurred first. The evolution law of mechanical properties and toughness of SCBSB with three corrosion forms was quantitatively described by prediction models, which could predict the mechanical properties and toughness of SCBSB with three corrosion forms at any degree of corrosion. Finally, according to the test results and the requirements of GB/T 1499.2—2018, the paper suggested that the corrosion degree of SCBSB should be controlled below 10.7% to ensure the service performance of the structure.
- stainless-clad bimetallic steel bars,
- corrosion form,
- mechanical properties,
- toughness

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References

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