Coloring hot-dip galvanization of steel samples in industrial zinc-manganese baths

Godzsák, Melinda; Lévai, Gábor; Vad, K.; Csík, A.; Hakl, J.; Kulcsár, Tibor; Kaptay, George

doi:10.2298/jmmb170531028g

Cited by 4 publications

(2 citation statements)

References 12 publications

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“…The most important joining process of high strength thin sheets is welding. The arc welding of AHSS and UHSS can be challenging due to the unwanted phase transformations and the possible coatings [8][9][10][11]. For these reasons, the mostly applied joining process for AHSS and UHSS thin sheets is resistance spot welding (RSW) [12,13].…”

Section: Introductionmentioning

confidence: 99%

Prediction of the Shear Tension Strength of Resistance Spot Welded Thin Steel Sheets from High- to Ultrahigh Strength Range

Májlinger

Katula

Varbai

2021

Period. Polytech. Mech. Eng.

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The tensile strength of newly developed ultra-high strength steel grades is now above 1800 MPa, and even new steel grades are currently in development. One typical welding process to join thin steels sheets is resistance spot welding (RSW). Some standardized and not standardized formulas predict the minimal shear tension strength (STS) of RSWed joints, but those formulas are less and less accurate with the higher base materials strength. Therefore, in our current research, we investigated a significant amount of STS data of the professional literature and our own experiments and recommended a new formula to predict the STS of RSWed high strength steel joints. The proposed correlation gives a better prediction than the other formulas, not only in the ultra-high strength steel range but also in the lower steel strength domain.

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Section: Introductionmentioning

confidence: 99%

Prediction of the Shear Tension Strength of Resistance Spot Welded Thin Steel Sheets from High- to Ultrahigh Strength Range

Májlinger

Katula

Varbai

2021

Period. Polytech. Mech. Eng.

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“…Decorative issues are also important. From this reason manganese is added into the bath [1]. Currently, plating steel parts consume about 60% of the worldwide zinc production.…”

Section: Introductionmentioning

confidence: 99%

Production of zinc oxide from hazardous waste - Sal Ammoniac Skimming

Pirošková

Trpčevská

Oráč

et al. 2018

J min metall B Metall

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This article deals with hydrometallurgical treatment with the subsequent precipitation of zinc from hazardous waste Sal-Ammoniac Skimming produced in wet hot-dip galvanizing process. Chemical analysis showed that skimming contained 46.64% Zn. X-ray diffraction analysis identified the Zn(OH)Cl phase (96.36%) and NH 4 Cl (3.64%) in Sal-Ammoniac Skimming. The skimming was first subjected to leaching in order to extract zinc into the solution containing HCl, followed by precipitation of the zinc. The experiments were performed in a medium of HCl at concentrations of 0.25, 0.5, 1 and 2M. Complete dissolution of zinc was achieved in 0.5M HCl solution, at 40°C, L:S=20, max. 30 min. The apparent activation energy of leaching reaction by hydrochloric acid solution was Ea=5.543 kJ mol -1 . Zn precipitation was carried out using Na 2 CO 3 and NaOH. Zinc oxide with a purity of about 99% was obtained directly from the solution of 6M NaOH at a temperature of 60°C -80°Cat pH 8.8. ApstraktOvaj rad se bavi hidrometalurškim postupkom sa naknadnim taloženjem cinka iz opasnog otpada, odnosno pene amonijum hlorida nastale tokom postupka toplog cinkovanja u vlažnim uslovima. Hemijska analiza je pokazala da pena sadrži 46,64% cinka. Rentgenskom difrakcijom je ustanovljeno postojanje dve faze u peni amonijum hidroksida, faza Zn(OH)Cl (96.36%) kao i faza NH4Cl (3.64%). Pena je najpre lužena da bi se izdvojio cink u rastvoru HCl, da bi nakon toga došlo do taloženja cinka. Eksperimenti su izvedeni u prisustvu HCl, pri koncentracijama 0,25, 0,5, 1 i 2M. Potpuno razlaganje cinka je postignuto u rastvoru HCl koncentracije 0,5M, na 40°C, u odnosu T:Č=20, u periodu od maksimalno 30 min. Dobijena energija aktivacije reakcije luženja u prisustvu hlorovodonične kiseline iznosila je Ea=5.543 kJ mol-1. Taloženje cinka je postignuto u prisustvu Na2CO3 i NaOH. Cink oksid, čistoće 99%, dobijen je direktno iz rastvora 6M NaOH na temperaturi od 60°C -80°C pri pH vrednosti 8,8.

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Investigation of the ASPN process of low alloy steel by using Ni or Cr coated active screens

Kovács

Dobránszky²,

Fodor

et al. 2020

Surface and Coatings Technology

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Coloring hot-dip galvanization of steel samples in industrial zinc-manganese baths

Cited by 4 publications

References 12 publications

Prediction of the Shear Tension Strength of Resistance Spot Welded Thin Steel Sheets from High- to Ultrahigh Strength Range

Prediction of the Shear Tension Strength of Resistance Spot Welded Thin Steel Sheets from High- to Ultrahigh Strength Range

Production of zinc oxide from hazardous waste - Sal Ammoniac Skimming

Investigation of the ASPN process of low alloy steel by using Ni or Cr coated active screens

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