The influence of welding treatment on corrosion rate on low carbon steel

• Main Authors: Umara, Andi Maga, Sudiyatno, Sudiyatno, Lahay, Idham Halid, Anwar, Choyrul
• Format: Conference Proceeding
• Language: English
• Subjects: Chemical damage; Chemical elements; Chemical reactions; Corrosion; Corrosion rate; Corrosion tests; Immersion tests (corrosion); Low carbon steel; Low carbon steels; Seawater; Shipbuilding; Sodium chloride; Steel construction; Steel plates; Sulfuric acid; Weight loss measurement; Welding
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0214366

Corrosion is a chemical reaction that occurs in metal that causes damage to its microstructure, better known as rust. Corrosion can occur in all types of metal, even steel combined with carbon. Low carbon steel is carbon steel that on commonly used as the primary material for ship construction. NaCl and H2SO4 are chemicals that can theoretically make metals corrode (corrosive). NaCl and H2SO4 were used as test media because the chemical elements in the media were contained in seawater. The media can be used to test the corrosion rate of low-carbon steel, the primary material of ship construction. This research was conducted to obtain the value of the corrosion rate on low-carbon steel using NaCl and H2SO4 media. The next objective is to see whether NaCl and H2SO4 media affect the corrosion rate of low-carbon steel. Before being tested, this low-carbon steel plate is prepared to be a test object. The low carbon steel plate to be tested is a low carbon steel plate that has been treated with welding. The corrosion rate test used two immersion media, namely NaCl media and H2SO4 media. Specimens were put into NaCl and H2SO4 media for four weeks; weight loss was measured weekly. The research method used is an experimental method to calculate the corrosion rate using the weight loss method. The results showed the highest corrosion rate in NaCl media was in the test object with a concentration of A of 4% with a value of 0.001960 mm/year in the fourth week. Then the value of the most significant corrosion rate on H2SO4 media is 0.01577 mm/year. On specimen A with a concentration of 4.5% in the first week. Then, statistically, the one-way ANOVA test shows that NaCl and H2SO4 significantly affect the corrosion rate of low-carbon steel.