Nephelium lappaceum Extract as an Organic Inhibitor to Control the Corrosion of Carbon Steel Weldment in the Acidic Environment

Sustainability

Kartika A. Madurani¹  Femiana Gapsari²  Djarot B. Darmadi²  Putu H. Setyarini²  Hendra Hermawan³  Ayoub Tanji³  Hubby Izzuddin⁴ 

[1] Department of Chemistry, Faculty of Science and Data Analytics, Institut Teknologi Sepuluh Nopember, Arief Rahman Hakim, Surabaya 60111, Indonesia;Department of Mechanical Engineering, Faculty of Engineering, Brawijaya University, MT Haryono 167, Malang 65145, Indonesia;Department of Mining, Metallurgical and Materials Engineering, Laval University, Quebec City, QC G1V 0A6, Canada;Research Center for Physics, National Research and Innovation Agency, Bld 440-442 Komplek Puspiptek Serpong, Tangerang Selatan 15314, Indonesia;

关键词: acidic environment;    corrosion;    electrochemical test;    Nephelium lappaceum;    organic inhibitor;    weldment;   

DOI  :  10.3390/su132112135

来源: DOAJ

【 摘 要 】

Organic inhibitors have been considered as an effective way to control the corrosion of carbon steel weldment in an acidic environment. This work proposes a new green organic inhibitor made of extract of rambutan fruit (Nephelium lappaceum) peel and aims at analyzing its corrosion inhibitor properties and protection mechanism. Specimens of carbon steel weldment were tested for their corrosion by using electrochemical and immersion methods in 1 M HCl solution containing 0 to 6 g/L of Nephelium peel (NP) extract. Results showed that, in the same solution, the corrosion rate was measured to be higher on the weld metal zone than that of base metal zone, which could be related to the coarser grain of the weld metal zone and the stability of the formed oxide layer. The addition of NP extract was found to increase the stability of the oxide layer, thus increasing the corrosion resistance of the specimens. The maximum inhibition efficiency of the NP extract was reached at 97% for weld metal with 5 g/L of extract, at 80% for the heat affected zone with 5 g/L, and at 70% for base metal with 4 g/L. This work reveals the particularity of different weldment zones to the different needs of inhibitor concentration for obtaining the optimum corrosion protection.

【 授权许可】

Unknown