Kesan ablasi laser gentian denyut dalam air terhadap kakisan dan kekerasan permukaan keluli kalis karat

Translated title of the contribution: Effect of pulsed laser ablation in water on the corrosion behaviour and surface hardness of stainless steels

Sze Ney Chan, Wai Yin Wong, Walvekar Rashmi, Abdul Amir H. Kadhum, Mohammad Khalid, Kean Long Lim

Research output: Contribution to journalArticle

Abstract

This work presents the use of pulsed fibre laser ablation in water (PLAW) to study the corrosion behaviour and surface hardness of stainless steels. A stainless-steel plate was ablated with a pulsed ytterbrium-doped fibre laser at a power of 4.2 W. The laser-ablated sample was subjected to corrosion testing using electrochemical impedance spectroscopy and potentiodynamic polarisation. The results correlated with surface morphology, X-ray diffraction profiles and Vicker’s hardness values. PLAW can enhance the corrosion resistance of stainless steels in both neutral and acidic electrolytes. The corrosion potential of the laser-treated samples was more positive at −126 and −423 mV compared with that of the as-received samples at −209 and −439 mV in neutral and acidic electrolytes, respectively. The inhibition efficiencies of the laser-treated samples in neutral and acidic electrolytes were 98% and 52%, respectively. An improvement in the surface microhardness at a maximum of 8.7% was reported on the fibre laser-ablated stainless steels, thereby demonstrating the efficiency of fibre-laser-assisted PLAW in inhibiting corrosion and improving the hardness of stainless steel.

Original languageMalay
Pages (from-to)155-169
Number of pages15
JournalMalaysian Journal of Analytical Sciences
Volume23
Issue number1
DOIs
Publication statusPublished - 1 Feb 2019

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Stainless Steel
Laser ablation
Fiber lasers
Pulsed lasers
Hardness
Corrosion
Water
Electrolytes
Lasers
Potentiodynamic polarization
Vickers hardness
Electrochemical impedance spectroscopy
Microhardness
Surface morphology
Corrosion resistance
X ray diffraction
Testing

ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

Kesan ablasi laser gentian denyut dalam air terhadap kakisan dan kekerasan permukaan keluli kalis karat. / Chan, Sze Ney; Wong, Wai Yin; Rashmi, Walvekar; Kadhum, Abdul Amir H.; Khalid, Mohammad; Lim, Kean Long.

In: Malaysian Journal of Analytical Sciences, Vol. 23, No. 1, 01.02.2019, p. 155-169.

Research output: Contribution to journalArticle

Chan, Sze Ney ; Wong, Wai Yin ; Rashmi, Walvekar ; Kadhum, Abdul Amir H. ; Khalid, Mohammad ; Lim, Kean Long. / Kesan ablasi laser gentian denyut dalam air terhadap kakisan dan kekerasan permukaan keluli kalis karat. In: Malaysian Journal of Analytical Sciences. 2019 ; Vol. 23, No. 1. pp. 155-169.
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