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Research Article

Year : 2018 | Volume: 3 | Issue: 2 | Pages: 1-8

Strip Thickness Effect on Scale Thickness and Picklability for “S235JR”

M.A.Darweesh1*, F.M Mahgoub, A.M Hefnawy, A.M Abo Helwa 2

https://dx.doi.org/doi:10.18831/djchem.org/12018021001

Corresponding author

M.A.Darweesh*

Physics and mathematical Engineering department, Faculty of Engineering, Tanta University, Egypt.

  • 1. Physics and mathematical Engineering department, Faculty of Engineering, Tanta University, Egypt.

Received on: 2018/08/04

Revised on: 2018/08/09

Accepted on: 2018/08/24

Published on: 2018/08/31

  • Strip Thickness Effect on Scale Thickness and Picklability for “S235JR”, M.A.Darweesh, F.M Mahgoub, A.M Hefnawy, A.M Abo Helwa 2018/08/31, DJ Journal of Engineering Chemistry and Fuel, 3(2), 1-8, https://dx.doi.org/doi:10.18831/djchem.org/12018021001.

    Published on: 2018/08/31

Abstract

The operating strips with different thicknesses and similar operating speed at Al Ezz Dekheila Steel Company (EZDK) Pickling Line (PKL) causes incomplete descaling especially at strips’ corners for thicker strips, which affects the product quality leading to downgrading. The main objective of this study is to explore the effect of steel strip thickness on the scale layer thickness and picklability of steel grade “S235JR”. Samples are collected and tested using pickling simulator and are prepared to match the concentrations of hydrochloric acid tanks of the company. The pickling line operating speed varies from 60 m/min to 274 m/min according to the strip thickness. Certain samples are tested using scanning electron microscope and X-ray diffraction. The results show that the chemical descaling time of steel grade S235JR increases as the strip thickness increases in which the pickling speed is optimized successfully.

Keywords

Oxide scale, Thickness, Picklability, Pickling simulator, EZDK.