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All Journal JURNAL KIMIA SAINS DAN APLIKASI
Nadhor, Fatwa Khoirrun
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Chemical Engineering, Chemistry & Bioengineering Chemistry Engineering

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Improvement of Pitting Corrosion Resistance in Type 201 Stainless Steel by Electrochemical Method in Nitric Acid Solution Hastuty, Sri; Yulia, Fayza; Sambudi, Nonni Soraya; Fauzi, Alfian Kahfi; Nadhor, Fatwa Khoirrun
Jurnal Kimia Sains dan Aplikasi Vol 28, No 4 (2025): Volume 28 Issue 4 Year 2025
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.28.4.208-214

Abstract

Stainless steel is widely utilized across industries due to its robust resistance to corrosion. Stainless Steel 201 (SS201), characterized by a lower nickel content compared to grade 304, is valued for its cost-effectiveness and strong mechanical properties. However, SS201 is more prone to pitting corrosion in aggressive environments than SS304. This research aims to enhance SS201’s resistance to pitting corrosion through surface treatment involving nitric acid. Cyclic voltammetry was conducted using nitric acid concentrations of 1, 2, and 3 M. The findings indicate that higher concentrations of nitric acid improved corrosion resistance, with 3 M resulting in a pitting depth of 23.667 μm. The application of citric acid contributed to enhanced resistance against pitting corrosion by fostering a chromium-rich surface.
Co-Authors Fauzi, Alfian Kahfi Sambudi, Nonni Soraya Sri Hastuty, Sri Yulia, Fayza