Effect of Addition Tahongai Leaf Extract (Kleinhovia hospita Linn.) As Organic Inhibitor on 1040 AISI Steel

International Conference on Design and Application of Engineering Materials in conjunction with Seminar Nasional Metalurgi dan Material XI (SENAMM)

材料科学;金属学

Yunita, Triana^1 ; Putri Kusuma, Asih Wentika^1 ; Novita, Sari Eli^1 ; Sulistijono^1

Department of Materials and Metallurgical Engineering, Institut Teknologi Kalimantan, Kampus ITK Karang Joang, Balikpapan

76127, Indonesia^1

关键词: Anti-oxidant activities;    Corrosion inhibition;    Effect of addition;    Immersion time;    Kleinhovia hospita;    Leaf extracts;    Organic inhibitors;    Polarization measurements;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/547/1/012006/pdf
DOI  :  10.1088/1757-899X/547/1/012006

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

This research will study about corrosion inhibition by using tahongai leaf extract (Kleinhovia hospita Linn.) in a 3.5% NaCl environment. The inhibitor is extracted using maceration process from Tahongai leaf (Kleinhovia hospita Linn.). Testing of antioxidant activity using DPPH method gives result that antioxidant activity of tahongai leaf extract (Kleinhovia hospita Linn.) is strong antioxidant (96%) compared to vitamin C (98%), functional group test by FTIR method indicates that tahongai leaf extract (Kleinhovia hospita Linn.) contain flavonoid shown by O-H bond (3357.41 cm-1), double bond C=C (164 3.36 cm-1), C-H bond (2922.24 cm-1, 1460.69 cm-1, 1375.57 cm-1), Efficiency of inhibition reach 99.9825% for addition of inhibitor with concentration 200 ppm and duration of immersion 20 days. This inhibition behavior is also supported by polarization measurements where the lowest corrosion rate of 8.3x10-4 mm/year is obtained at the same concentration and immersion time.