Bio-Inhibitor on Corrosion Rate of ASTM A53 Steel in Marine Environment

Abstract

There are many methods to prevent the corrosion process. One of them is corrosion inhibitors usage. Inhibitor divided into two types, there are organic inhibitor and non-organic inhibitor. Organic inhibitor could be obtained by extracting some materials which exist in nature. In this research, bio-inhibitors were made from rambutan (Nephelium lappaceum) peel, banana (Musa acuminata Colla) peel, mango (Mangifera indica L.) leaves and papaya (Carica papaya)leaves. The determination of corrosion rate used weight loss method. The material of carbon steel ASTM A53 was used in the research. The salinity of artificial seawater was 35 ‰. The results showed that corrosion rate on carbon steel ASTM A53 was 0.2172 mpy at mango leaves and the efficiency of those inhibitor was 44.5% . The corrosion rate carbon steel ASTM A53 was 0.2436 mpy for corrosion rate and 37.8% of inhibitor efficiency when it used papaya leaves as bioinhibitor. Meanwhile, it reached 0.2739 mpy and 0.2812 mpy of corrosion rate for banana peel and rambutan peel, respectively. The efficiency of inhibitor were 30% and 28.2% for banana peel and rambutan peel, respectively. The corrosion rate on carbon steel ASTM A53 without inhibitor was 0.3914 mpy. Based on the microstructure results, all specimens in all variation of treatments showed pitting corrosion and uniform corrosion on specimen. In conclusion, mango leaves, papaya leaves, banana peel and rambutan peel have potentially to be used as bioinhibitor to decrease the corrosion rate in marine environment.

Ekstrak Daun Kaliandra Sebagai Inhibitor Alami Laju Korosi St-37

“…Tanin memiliki gugus fenolik yang memiliki kemampuan untuk membentuk garam tanninate dengan ion ferric. Proses inhibisi korosi dari tanin dapat disebabkan oleh pembentukan jaringan dari garam ferric tanninate yang melindungi permukaan logam [24][25][26][27].…”

Comparative Studies on the Anti‐Corrosive Action of Waterproofing Agent and Plant Extract to Steel Rebar

“…[ 38 ] The results disclosed that the plant extract exhibited the maximum inhibition efficiencies of 99% (in NaCl), and 92% (in HCl), due to an increase in the hydrophobic nature of the passive layer on the surface of steel. [ 39 ] A high binding energy between the secondary metabolite molecules with abundant electrons in the plant extracts and carbon steel demonstrates from quantum chemical calculations, [ 40 ] and molecular dynamic simulation as well the XPS studies. [ 41 ] This might be one of the reasons for the formation of more protective solid passive layers which hinder the corrosion of steel in various aggressive environments.…”

Performance of Anticorrosive Measures of Steel in Concrete Infrastructure by Plant‐Based Extracts

“…Similarly, the ethanolic extract of M. indica leaves was examined to minimize the corrosion of steel in acid [ 35,36 ] and saline [ 37,38 ] solutions. The plant extract was enhanced to increase the hydrophobic level of the passive film on the rebar surface.…”

“…[33] Also, ethanolic extract of 25% P. guajava leaves showed maximum corrosion protection of about 97% in seawater. [34] Similarly, the ethanolic extract of M. indica leaves was examined to minimize the corrosion of steel in acid [35,36] and saline [37,38] solutions. The plant extract was enhanced to increase the hydrophobic level of the passive film on the rebar surface.…”