Influence of chloride deposition rate on rust layer protectiveness and corrosion severity of mild steel in tropical coastal atmosphere

Chen, Heng; Cui, Huaiyun; He, Zebang; Lü, Lin; Huang, Yunhua

doi:10.1016/j.matchemphys.2020.123971

Cited by 26 publications

(11 citation statements)

References 46 publications

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“…A similar chloride distribution pattern was observed in the model proposed by cole et al 36,37 An exceptionally high Cldeposition rate occurred at the shoreline and dropped suddenly as the distance from the sea increased within the first km. Compared with the model in the coastal region of Guangdong province proposed by Chen et al 38 , based on only 4 exposure sites were proposed 200 m away from the shoreline, the chloride diffusion model in our work are more reasonable to satisfy the "fast followed by slow" trend. Based on this model, 2918 sites in coastal provinces were selected to calculate their chloride ion deposition rates according to the above equation.…”

Section: Chloride Ion Diffusion Model In Coastal Regionmentioning

confidence: 68%

Classification and spatial mapping of atmospheric corrosion of China

Hao

Chen

et al. 2022

npj Mater Degrad

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Atmospheric corrosion is ubiquitous in China but varies a lot among different regions covering the cold, temperate, and tropical zones. Categorizing the atmospheric corrosivity and plotting precise atmospheric corrosion map remain key interest for a variety of industries. The present work proposed an atmospheric corrosion map of China for hot-dip galvanized steels, which was constructed by inverse distance weighting (IDW) interpolation algorithm based on both the measured corrosion rates of coupons exposed at 2393 inland test stations and calculated corrosion rates from a prevalent dose-response function in 2918 sites in coastal regions. When the corrosion category was used as the criterion, the IDW interpolation algorithm of power 2 performed best. Cross-validation results confirmed that the prediction accuracy of IDW interpolation reached 85.6%. Based on the corrosion map, the categories of atmospheric corrosivity in China could be determined.

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Section: Chloride Ion Diffusion Model In Coastal Regionmentioning

confidence: 68%

Classification and spatial mapping of atmospheric corrosion of China

Hao

Chen

et al. 2022

npj Mater Degrad

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“…According to Figure 12 a,b, plenty of flake corrosion products were formed under the blisters after the immersion in the T. funiculosus -contained medium for 14 days. The EDS results showed that the corrosion products mainly consisted of Fe (26.0 wt.%), O (43.9 wt.%), and C (30.1 wt.%), indicating that γ-FeOOH may exist [ 38 ]. Furthermore, globular corrosion products consisting of Fe (14.2 wt.%), O (29.4 wt.%), and C (56.4 wt.%) were observed under the coating, as shown in Figure 12 c,d.…”

Section: Resultsmentioning

confidence: 99%

“…The Raman spectra were performed to further determine the compositions of the corrosion products, and the results are shown in Figure 13 . The peaks at 169 cm −1 , 622 cm −1 , and 1004 cm −1 belong to γ-FeOOH, γ-Fe 2 O 3 , and α-FeOOH, respectively [ 38 ]. These results basically agreed with the EDS and SEM results.…”

Section: Resultsmentioning

confidence: 99%

Investigating Different Local Polyurethane Coatings Degradation Effects and Corrosion Behaivors by Talaromyces funiculosus via Wire Beam Electrodes

et al. 2023

Self Cite

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The degradation effect of mold on the coating in a hot and humid environment is one of the important factors that cause layer failure. Combined with the wire beam electrode (WBE) and the traditional surface analysis technique, the local biodegradation of the coatings and the corrosion behaviors of metal substrates can be characterized accurately by a WBE. Herein, a WBE was used to study the degradation impact of Talaromyces funiculosus (T. funiculosus) isolated from a tropical rainforest environment on the corrosion of polyurethane (PU) coating. After immersion for 14 days, the local current density distribution of the WBE surface can reach ~10−3 A/cm2 in the fungal liquid mediums but maintains ~10−7 A/cm2 in sterile liquid mediums. The |Z|0.01Hz value of the high current densities area (#85 electrode) was 1.06 × 109 Ω cm2 in a fungal liquid medium after 14 days of immersion. After being attacked by T. funiculosus, the degradation of the PU was more severe, and there were wrinkles, cracks, blisters, and even micro-holes distributed randomly on the surface of electrodes. This resulted from the self-corrosion caused by the T. funiculosus degradation of the coating; the corrosion caused by the electric coupling effect of the coating was introduced. Energy dispersive spectroscopy (EDS) and Raman spectra results showed that the corrosion products were flakey and globular, which consisted of γ-FeOOH, γ-Fe2O3, and α-FeOOH.

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“…The parameters that were used to verify the correct measurement of the alcoholic level are Pearson's correlation coefficient [11] and the mean error in different ranges of alcohol level (low, moderate and high).…”

Section: Resultsmentioning

confidence: 99%

An Electronic Equipment with Face Recognition Capacity Oriented to Measuring the Alcoholic Level in People

Merino

Chavesta

Kemper

et al. 2021

Communications in Computer and Information Science

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This work proposes an equipment oriented to measuring the alcoholic level and simultaneously applying face recognition for people who enter risk places where their physical integrity can be affected due to their drunkenness state. In the state of the art, it is verified that several methods of measuring breathalyzer do not integrate the simultaneous facial recognition for the purposes of proper personnel access control and registration. It is also verified that subjective methods are applied such as the emitted smell perception, gait, the way of speaking or behavioral aspects. The proposed equipment consists of electronic devices that allow the detection of air flow and the measurement of the alcoholic level through a reduced board computer. Biometric face recognition is carried out through image processing algorithms, convolutional neural networks and support vector machines SVM, which run on a computer which is synchronized with the measurement equipment. The computer registers the recognized person in a database with the associated detected alcoholic level. For the validation of the proposed equipment, several samples of alcoholic level, delay times in the acquisition of images and the face recognition rate were evaluated. Alcohol level measurements were compared with those obtained through a certified digital breathalyzer. In this validation, Pearson's correlation coefficient was used, obtaining a value of 0.937. The maximum time delay in capturing the image during the emission of the airflow by the person was 0.067 s, while the percentage of true face recognition was higher than 95%.

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Influence of chloride deposition rate on rust layer protectiveness and corrosion severity of mild steel in tropical coastal atmosphere

Cited by 26 publications

References 46 publications

Classification and spatial mapping of atmospheric corrosion of China

Classification and spatial mapping of atmospheric corrosion of China

Investigating Different Local Polyurethane Coatings Degradation Effects and Corrosion Behaivors by Talaromyces funiculosus via Wire Beam Electrodes

An Electronic Equipment with Face Recognition Capacity Oriented to Measuring the Alcoholic Level in People

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