Effect of strip entry temperature on the interfacial layer and corrosion behavior of galvanized steel

Kancharla, Harikrishna; Mandal, G. K.; Singh, Sudhanshu S.; Mondal, K.

doi:10.1016/j.surfcoat.2021.128071

Cited by 16 publications

(3 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It can be seen that when the annealing temperature is below 800℃, it is equivalent to tempering and aging treatment, and a small amount of cementite in the sample matrix disappears and the grain size of ferrite, yield strength, tensile strength and elongation are equivalent to those of hot-rolled sample. When the annealing temperature is above 800℃, phase transformation occurs, a small amount of cementite in the sample matrix disappears, the grain size of ferrite increases, while yield strength, tensile strength and elongation decrease [17]. For DD51D+AZ, the anneal temperature is 690-730℃, so DD51D+AZ and SD235+AZ anneal at this temperature, with no obvious effect on the mechanical property of finished products.…”

Section: Process Parameter Control Of Continuous Annealing Temperaturementioning

confidence: 99%

Process Study and Application of Hot-rolled Aluminum-Zinc Plating Steel Plate Unit

Shi¹,

Qian-hua²,

Wen³

2022

IJHT

View full text Add to dashboard Cite

In accordance with the requirements of hot-rolled aluminum-zinc plating and cold-rolled aluminum-zinc plating mixed line for producing construction steel and the production process characteristics of hot-dip aluminum-zinc products, the critical process control points are put forward by combining theoretical analysis with experimental verification. We should select proper raw materials, ensure the cleanliness of strip steel surface, strictly control the annealing temperature, the temperature of the strip steel entering the zinc pan, the temperature and composition of the plating bath, and explore reasonable and feasible process parameters such as air knife and cooling after plating, so as to produce qualified products. This study is of great significance for the improvement and process control of hot-rolled aluminum-zinc plating plates in steel plate production enterprises.

show abstract

Section: Process Parameter Control Of Continuous Annealing Temperaturementioning

confidence: 99%

Process Study and Application of Hot-rolled Aluminum-Zinc Plating Steel Plate Unit

Shi¹,

Qian-hua²,

Wen³

2022

IJHT

View full text Add to dashboard Cite

show abstract

“…Cetinkaya et al [ 8 ] reported the impact of chemical treatment on Zn-Al-Mg coating produced by a hot-dip process in order to increase Zn fraction at the coating surface. The influence of galvanizing temperature on corrosion resistance was also investigated [ 9 ], as well as the contribution of Mn to the morphology and corrosion resistance of Zn coating [ 10 ]. Finally, Kang et al [ 11 ] investigated Fe-Zn reaction during a hot-dip galvanizing and its influence on microcracking.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Measurement of Zn Layer Heterogeneity on the Flange of the Steel Road Barrier

et al. 2022

View full text Add to dashboard Cite

This study deals with monitoring of Zn layer heterogeneity on the flange of steel road barriers using magnetic measurements. The Barkhausen noise technique is employed for such purpose, and parameters extracted from Barkhausen noise signals are correlated with the true thickness of the Zn layer. The true values of the Zn layer were obtained from the metallographic images, as well as the thickness gauge CM-8825FN (Guangzhou Landtek Instruments Co. Ltd., Guangzhou, China) device. It was observed that the diffusion region lies below the Zn protective layer, which makes the thickness of the Zn layer obtained from the CM-8825FN device thicker than that measured on the metallographic images. For this reason, the chemical gradient of Zn below the Zn layer can be reported, and it affects Barkhausen noise emission. Barkhausen noise decreases along with increasing thickness of the Zn layer, and Barkhausen noise envelopes are shifted to stronger magnetic fields. The number of strong MBN pulses drops down with the increasing thickness of Zn coating at the expense of the increasing number of the weak MBN pulses. The thickness of Zn coating can be polluted by the solidification of Zn melt after galvanizing. The presence of the diffusion layer dims the contrast between ferromagnetic and paramagnetic phases.

show abstract

“…Continuous galvanizing offers precisely controlled coating thickness and quality, as the product exits molten zinc bath, high-pressure air knifes are used to remove excess molten zinc, then the product is cooled and rolled into large coils before delivery to the end user for eventual fabrication (cutto-length and formed to be used in automotive body panels, appliances, roofing, etc.). For the continuous hot dipped galvanizing process, the coating consists of a thin Al-Fe alloy interphase layer close to the steel surface, little amount of aluminum oxide is also considered as a contribution to shiny appearance [14][15][16]. After exposure to corrosive atmosphere, analysis of corrosion products provides significant data about the corrosion mechanism and the influence of species present in the environment [17].…”

Section: Introductionmentioning

confidence: 99%

Atmospheric Corrosion Behavior of Hot-Dip Galvanized and Continuous Galvanized Steel

Sığırcık¹,

Yıldırım²,

Tüken

2022

Acta Metall Slovaca

View full text Add to dashboard Cite

Five years of outdoor atmospheric corrosion tests of hot dip galvanized steel samples were performed, for products of continuous galvanizing and after fabrication batch galvanizing processes. For the purpose of comparison between corrosion performances of these two different galvanizing process products, an industrial coastal area (Gemlik-Bursa/TURKEY) was chosen for outdoor testing, which fits into C4 type corrosive atmosphere definition, according to ISO 9223. Samples were studied in laboratory with accelerated salt spray exposure test and electrochemical methods. Corrosion products formed on exposed samples and cross section of coatings are analyzed by SEM. Lead is observed to change the corrosion characteristics of the coatings with change in constituents of environments. In saline electrolytes, alloying of lead is found to accelerate corrosion rate. This metal deposits as cluster on top layer of the galvanized coatings and acts as strong cathodes with respect to the zinc and accelerates the corrosion rate. It was determined that differences in dip and continuous galvanization processes cause dramatic differences in the elemental composition, morphology and regional hardness values of coatings. In the comparison of corrosion resistance, lower performance of the dip galvanized coating, although it is much thicker, has been shown due to the differences mentioned above.

show abstract

Effect of strip entry temperature on the interfacial layer and corrosion behavior of galvanized steel

Cited by 16 publications

References 34 publications

Process Study and Application of Hot-rolled Aluminum-Zinc Plating Steel Plate Unit

Process Study and Application of Hot-rolled Aluminum-Zinc Plating Steel Plate Unit

Magnetic Measurement of Zn Layer Heterogeneity on the Flange of the Steel Road Barrier

Atmospheric Corrosion Behavior of Hot-Dip Galvanized and Continuous Galvanized Steel

Contact Info

Product

Resources

About