Corrosion Behavior of Q235 Steel Exposed in Deepwater of South China Sea

Ding, Kangkang; Guo, Weimin; Qiu, Ri; Hou, Jian; Fan, Lin; Xu, Likun

doi:10.1007/s11665-018-3553-x

Cited by 42 publications

(11 citation statements)

References 14 publications

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“…To evaluate effects of deep sea environmental factors including pressure, pH value, conductivity, temperature, dissolved oxygen concentration and so on, gray relational analysis was carried out in this paper [34,35]. The data of deep sea environmental factors (based on our previous work [19,36]) serve as comparison series and the data of corrosion rates as reference series. All the data went through a dimensionless treatment using the equalisation method, and then the gray relational degree of environmental factors to the corrosion rate was calculated according to the following formula:…”

Section: Analysis and Discussionmentioning

confidence: 99%

“…The degreasing treatment and the following measurement of specimen size and weight were carried out before the field exposure. High-efficiency serial deep-sea experimental installation was autonomously designed and developed to apply to the natural deep-sea deploy experiments in South China Sea [18,19] and was shown in Figure 1. During the deploy process, the work ship proceeded with a speed of 0.5 NM/h, all parts were released into the sea in a top-down order and the installation was anchored to seabed through sinking the bottom cement anchor down.…”

Section: Introductionmentioning

confidence: 99%

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Corrosion behaviour investigation of 460 low alloy steels exposed in the natural deep-sea environment

Duan

Ding

et al. 2019

Corrosion Engineering, Science and Technology

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The corrosion behaviours of 460 low alloy steels were investigated by the field exposure corrosion experiments with various long periods and 1200-3000 m depths in the natural deep-sea environment. XRD analysis results indicate that corrosion products of β-FeOOH, γ-FeOOH and Fe 3 O 4 increase and the corrosion product of α-FeOOH decreases with the exposure sea depth extending. Electrochemical experiment results reveal the corrosion status is aggravated with the exposure sea depth extending: corrosion potentials shift negatively to a minimum self-corrosion potential of −0.590 V (vs. SCE) and charge transfer resistances decrease to a minimum of 278 Ω cm 2 . Corrosion behaviours analysis shows that the average corrosion rate decreases with the time increasing and reaches a maximum value of 101 μm a −1 . The maximum pitting depth varies between 63.0 μm and 138 μm. Gray relational analysis shows that the corrosion rate of 460 steel is most influenced by the pressure and dissolved oxygen concentration of deep sea, exhibiting a positive correlation relationship.

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Section: Analysis and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Corrosion behaviour investigation of 460 low alloy steels exposed in the natural deep-sea environment

Duan

Ding

et al. 2019

Corrosion Engineering, Science and Technology

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“…Until now, only several countries in the world have carried out deep-sea corrosion experiments of materials, such as India, China, the United States, Norway and Italy. The experimental sea area mainly includes Mediterranean Sea [7], Indian Ocean [8], Arabian Sea [9], Pacific Ocean [10,11] and South China Sea [12][13][14]. The experimental materials include carbon steel, stainless steel, copper, brass and copper-nickel alloy and so on.…”

Section: Introductionmentioning

confidence: 99%

“…The corrosion morphology and the corrosion resistance were investigated for these aluminium alloys at the depth of about 3350 m. The researchers from Luoyang Ship Material Research Institute in China have been carrying out the deep-sea corrosion tests for many years since 2008, including the deep-sea exposure testing of different metallic materials, and the in-situ measurement of sacrificial anode performance and cathodic protection parameters of steel in deepsea water. The corrosion behaviour of some stainless steels, low alloy steels and carbon steel, and the electrochemical performance of aluminium-based galvanic anodes in deepsea water were reported [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Long-term corrosion behaviour of 1060 aluminium in deep-sea environment of South China Sea

Peng

Duan

Hou

et al. 2021

Corrosion Engineering, Science and Technology

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The serial-type deep-sea environmental test device was used to investigate the corrosion behaviour of 1060 aluminium exposed at real sea for 0.5 year and 2 years. Specimens were deployed at a depth of 1200, 2000 and 3000 m, respectively. A three-stage corrosion process was proposed after analysing the corrosion profile and the corrosion products of the specimens. The corrosion regularity was studied by employing the imaging processing technology and grey correlation analysis. The results show that the 1060 aluminium is prone to pitting and crevice corrosion. For the 0.5 year period test, the corrosion rate increases from 0.0114 to 0.0147 mm year −1 when the sea water depth increases from 1200 to 3000 m. For the 2 year period test, the corrosion rate first decreases and then increases when the sea water depth increases from 1200 to 3000 m, and the maximum corrosion rate at 3000 m depth is 0.006 mm year −1 . Oxygen content and conductivity are the most important factors affecting the corrosion rate.

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“…So far, most studies have focused on the failure mechanism of materials or coatings rather than on how to protect the substrates from deep‐sea corrosion . Therefore, we start with some work on the thermal spray coatings to protect the substrate materials.…”

Section: Introductionmentioning

confidence: 99%

Corrosion mechanism and behavior of high‐velocity arc‐sprayed Al–Ti–Si–RE coating in a simulated deep sea

Tong

Wei

Wang

et al. 2019

Materials & Corrosion

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The corrosion protection of deep-sea equipment using the economical method of thermal spraying has become a research hotspot. This study investigated the corrosion behavior of high-velocity arc-sprayed Al-Ti-Si-RE coating in a simulated deep sea with regard to microstructures, compositions, and electrochemical measurements. Results showed that the Al-Ti-Si-RE coating has excellent corrosion resistance at high hydrostatic pressure (HP). HP plays an important role in the anodic reaction of the coating, whereas dissolved oxygen (DO) mainly affects the cathodic reaction. HP accelerates the dissolution of the coating's passive film, which results in steady corrosion. The amount of corrosion products depends on DO. The corrosion of the self-sealing coating is inhibited in low DO when steady corrosion is achieved. K E Y W O R D S deep sea corrosion, dissolved oxygen, electrochemical noise, high-velocity arc-sprayed coating, hydrostatic pressure

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Corrosion Behavior of Q235 Steel Exposed in Deepwater of South China Sea

Cited by 42 publications

References 14 publications

Corrosion behaviour investigation of 460 low alloy steels exposed in the natural deep-sea environment

Corrosion behaviour investigation of 460 low alloy steels exposed in the natural deep-sea environment

Long-term corrosion behaviour of 1060 aluminium in deep-sea environment of South China Sea

Corrosion mechanism and behavior of high‐velocity arc‐sprayed Al–Ti–Si–RE coating in a simulated deep sea

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