The inhibitor is a substance added in small amounts which aims to inhibit the corrosion rate. Organic inhibitors are environmentally friendly inhibitors. Currently organic inhibitors are studied by many researchers. Natural ingredients are the raw material in research on organic inhibitors. In this research, polarization testing and FTIR have been done. Papaya leaves as a raw material of organic inhibitors are used, while the corrosive medium is a 1 M HCl solution. Based on the polarization test, the corrosion rate absence inhibitor was 21.43 mm/year. This corrosion rate decreased to 0.4 mm/year. Highest efficiency generated by 97%. This efficiency occurs in the presence of 2.5 ml concentration of corrosion solution. In the polarization testing showed that the inhibitory mechanism that occurs cathodic dominant. This is supported by FTIR test results. The results of this test indicate the absence of the same functional group between the extract and the specimen with the inhibitor. The inhibitory mechanism of cathodic inhibitors is that the inhibitor reacts with the corrosion solution so as to decrease the rate of corrosion that occurs.

Original languageEnglish
Title of host publicationDisruptive Innovation in Mechanical Engineering for Industry Competitiveness
Subtitle of host publicationProceedings of the 3rd International Conference on Mechanical Engineering, ICOME 2017
EditorsVivien S. Djanali, Suwarno, Bambang Pramujati, Volodymyr A. Yartys
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735416994
Publication statusPublished - 13 Jul 2018
Event3rd International Conference on Mechanical Engineering, ICOME 2017 - Surabaya, Indonesia
Duration: 5 Oct 20176 Oct 2017

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Conference3rd International Conference on Mechanical Engineering, ICOME 2017


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