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A rapid identification method for corrosion control mode of steel bar macrocells in marine concrete

A marine concrete and corrosion control technology, which is applied in the fields of weather resistance/light resistance/corrosion resistance, instruments, measuring devices, etc., can solve the problems of complex judgment process and many electrochemical parameters, and achieve simplified judgment process, fewer parameters, and detection The effect of easy operation

Active Publication Date: 2022-07-19
TIANJIN PORT ENG INST LTD OF CCCC FIRST HARBOR ENG +2
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, solve the problem in the prior art that the judgment process of the steel macro cell corrosion control mode in the marine concrete structure is complicated and involves many electrochemical parameters, and provides a simple concrete A rapid identification method for the corrosion control mode of steel bar macrocells in structures

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  • A rapid identification method for corrosion control mode of steel bar macrocells in marine concrete
  • A rapid identification method for corrosion control mode of steel bar macrocells in marine concrete
  • A rapid identification method for corrosion control mode of steel bar macrocells in marine concrete

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Embodiment Construction

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] The macro cell corrosion test is first performed to determine the macro cell corrosion control mode. A variety of different concrete structures are poured and formed. The concrete strength grade is not less than C30, the water-binder ratio is not more than 0.55, the amount of mineral admixtures is less than 60% of the total cementitious material, and the thickness of the protective layer of steel bars in the concrete structure is not less than 40mm. The content of chloride ions in concrete can be changed by directly adding chloride ions during mixing and by infiltrating chloride ions from the outside after hardening, so that the cathode and anode steel bars exhibit different electrochemical parameters, so as to simulate the corrosion of different macro cells state.

[0024]In the concrete structure, the area ratio of cathode r...

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Abstract

The invention discloses a rapid identification method for corrosion control mode of steel bar macro cells in marine concrete, and measures the corrosion potential E of cathode steel bars before macro cell corrosion occurs in concrete structures mi‑c Corrosion potential E of anodic steel bars before corrosion occurs in the macro cell mi‑a , calculate the macrocell potential difference ΔE between the cathode and anode steel bars corr 1. The demarcation relation of macro battery corrosion control mode is E mi‑c =0.5×(ΔE corr 1)-b, b is a constant, when b is taken as 382, ​​it is the boundary between the control mode of cathode steel bar and the control mode of mixed control mode, and when b is taken as 496, it is the boundary line between the control mode of mixed control mode and the control mode of anode steel bar. The rapid identification method of the present invention involves few electrochemical parameters, convenient detection and operation, and simple analysis process.

Description

technical field [0001] The invention belongs to the technical field of corrosion protection of steel bars, and particularly relates to a method for quickly identifying the corrosion control mode of steel bars in marine concrete, which greatly simplifies the determination process of the corrosion control mode of the macro battery. Background technique [0002] The long life of new and active marine reinforced concrete structures is the focus of attention and research in current engineering construction and operation and maintenance. To realize and ensure the long-life service of marine reinforced concrete structures, mainly from the aspects of durability design, construction and maintenance, control the performance degradation of concrete materials and inhibit the corrosion of steel bars. For marine reinforced concrete structures, the durability problem caused by steel corrosion is particularly significant. The durability problem caused by corrosion of steel bars is a key fa...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N17/02G01N17/00
CPCG01N17/02G01N17/006
Inventor 曹忠露苏忠纯李沛王娜张鹏周晓朋周佰祥雷周米胜东陈浩宇
Owner TIANJIN PORT ENG INST LTD OF CCCC FIRST HARBOR ENG
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