Application of Psidium guajava Leaf Extract as an Organic Inhibitor in Acid Solution and Temperature Variation.

Atria Pradityana*, Eddy Widiyono, Hari Subiyanto, Nur Husodo, Muhammad Saiful Rizal

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review


Corrosion is a change in the properties of a material, mainly metal, due to a reaction with the surrounding environment. One of the ways to inhibit corrosion is by adding inhibitors. Organic inhibitors are inhibitors that are considered environmentally friendly. In this study, the guava leaf extract of Psidium guajava was used as an organic inhibitor. Materials used are API 5L Grade B steel in 1M HCl solution as corrosive media with the concentration of the extract used in this study 1188ppm with a temperature variation of 30, 35, 40, 45, and 50 Celsius degrees. The types of tests carried out in this study were Electrochemical Impedance Spectroscopy and Potentiodynamic Polarization. The results of the potentiodynamic polarization test of organic inhibitors obtained an efficiency of 96.7550% with a corrosion rate of 1,04460 mm/year at a temperature of 30 degrees Celsius. In the electrochemical impedance spectroscopy test, the efficiency was 96,8546%, at a temperature of 30 degrees Celsius. The results of this study showed that the inhibitor of organic Psidium Guajava extract was the higher the temperature given to the inhibitor, it does not significantly affect the efficiency of the inhibitor, which acts the corrosion rate.

Original languageEnglish
Title of host publicationKey Engineering Materials
PublisherTrans Tech Publications Ltd
Number of pages6
Publication statusPublished - 2023

Publication series

NameKey Engineering Materials
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795


  • API 5LGrade B
  • HCL
  • Inhibitor
  • Psidium guajava leaf
  • Temperature


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