Changing oxide layer structures with respect to the dew point prior to hot-dip galvanizing of δ-TRIP steel

Wang, Hua; Jin, Xinyan; Hu, Guangkui; He, Yanlin

doi:10.1016/j.surfcoat.2017.12.046

Cited by 12 publications

(2 citation statements)

References 29 publications

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“…There was a large amount of Fe in the coating. This Fe diffused into the coating during hot-dip galvanization 28 , 29 . The distribution of Fe and Zn on the steel wire surface was uniform.…”

Section: Resultsmentioning

confidence: 99%

Application of a water jet for cleaning grease and improving the surface adhesion properties of galvanized steel wire ropes

Miao

Zhang²,

et al. 2022

Sci Rep

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Traditional cleaning processes may be banned in the near future because of the hazards they pose to the environment. In this study, a water jet was used to clean grease residues from steel wires for the first time. The EDS and SEM results of the steel wire rope surfaces and supplementary water jet impact experiments on galvanized steel plates revealed that when the pressure was lower than 50 MPa and the traverse speed was higher than 600 mm/min, the water jet caused minimal damage to the coating. When the pressure was 5 MPa, the cleaning ratio was between 45 and 60%, and the level of cleaning increased with increasing pressure. Two proposed concepts of exposure ratio and nonexposed area were applied to quantitatively analyze the theoretical upper and lower limits for grease that could be cleaned from two typical structures. The results showed that the lower and upper cleaning limits for structure 7 × 3 were 38.1% and 83.3%, while the lower and upper limits for structure 1 × 3 + 5 × 7 were 35.5% and 59.2%, respectively. This result explains why the grease content of structure 7 × 3 was lower than that of structure 1 × 3 + 5 × 7 after cleaning. In addition, the adhesion test results showed that adhesion to the two kinds of steel wire ropes after cleaning was increased by 126% and 145.71%, respectively, which means that additional processes for improving adhesion could be omitted after using a water jet for cleaning. This is an advantage that traditional cleaning processes do not offer.

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Section: Resultsmentioning

confidence: 99%

Application of a water jet for cleaning grease and improving the surface adhesion properties of galvanized steel wire ropes

Miao

Zhang²,

et al. 2022

Sci Rep

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“…Other authors have related the selective oxidation of alloying elements, under a certain atmosphere, with the partial pressure of the oxygen in the exposure environment, also known as dissociative pressure [7,[11][12][13][14][15]. In other studies [6,9,16,17], the dew point (DP) has also been proposed as the main driving force for the selective oxidation of Cr and other minor alloying elements. However, in an industrial environment, none of the above-mentioned factors can be completely controlled.…”

Section: Introductionmentioning

confidence: 99%

Characterisation of High Temperature Oxidation Phenomena during AISI 430 Stainless Steel Manufacturing under a Controlled H2 Atmosphere for Bright Annealing

García

Núñez

Bello

et al. 2021

Metals

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Localised-in-the-edge oxidation of four AISI 430 alloys was investigated after an industrial bright annealing process. The oxidised surface of each specimen was characterised by X-ray photoelectron spectroscopy (XPS), Raman-spectroscopy and SEM. The results showed that the selective oxidation of Cr and Mn took place at the coil edges of AISI 430. This led to the formation of an oxide scale based on Cr2O3 and MnCr2O4. On the other hand, the formation of Cr(OH)3 and MnOOH in the outer part of the oxide scale was related to the effect of the H2–N2 environment on the annealing furnace. The results concluded that the composition of Cr and Mn in the alloy determined the composition of the oxidation products. However, the effect of annealing time was minor in this oxidation mechanism, which slightly contributed to an increase in the cation diffusion from the steel to the oxide. Finally, the results obtained indicate that the colouration of the coil edges displayed in each studied material varies according to the alloy chemical composition and annealing time.

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Influence of coating and dew point on hearth roll pickup

Zheng

Kang

Zhou

2019

J. Iron Steel Res. Int.

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Changing oxide layer structures with respect to the dew point prior to hot-dip galvanizing of δ-TRIP steel

Cited by 12 publications

References 29 publications

Application of a water jet for cleaning grease and improving the surface adhesion properties of galvanized steel wire ropes

Application of a water jet for cleaning grease and improving the surface adhesion properties of galvanized steel wire ropes

Characterisation of High Temperature Oxidation Phenomena during AISI 430 Stainless Steel Manufacturing under a Controlled H2 Atmosphere for Bright Annealing

Influence of coating and dew point on hearth roll pickup

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