A master thesis from Aalborg University
Pitting Resistance Study after the Laser Forming of AISI 304 Stainless Steel and its Remediation Methods of Chemical Pickling and Laser Ablation Processes
Author(s)
Term
4. semester
Education
Publication year
2024
Submitted on
2024-11-14
Abstract
The current study aimed to evaluate how chemical pickling versus laser ablation re- mediation treatments affected the removal of the oxide layer on the base and laser- formed AISI 304 stainless steel surfaces with the purpose of mitigating pitting corrosion. This oxide layer is generated when stainless steel is exposed to high-temperature treat- ments, such as welding and lasers. How- ever, it is frequently essential to remove these oxides and enhance the metal quality, es- pecially while maintaining manufacturing equipment. This study investigated pro- cesses to achieve the most pitting-resistant metal behavior. Characterization methods used to evaluate the pitting corrosion resis- tance were: Ferric chloride pitting test, Cyclic Potentiodynamic Polarization, and SEM with EDX. A newly proposed method of conduct- ing cyclic potentiodynamic polarization mea- surements was applied to assess the pitting corrosion resistance. The mass loss and sur- face structures were also evaluated. Due to the dispersion of data, the results were un- certain. Nevertheless, from the correlation relationship between mass loss and pitting resistance, corrosion deterioration of both re- mediated study groups was greater than the base or laser-formed coupons.
Keywords
Documents
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