Oil palm empty fruit bunch extract and powder as an eco‐friendly corrosion inhibitor for mild steel: A comparison study

Abstract

A comparison study in terms of inhibition performance between oil palm empty fruit bunch (OPEFB) extract and OPEFB powder against mild steel corrosion in 1 M hydrochloric acid was evaluated using weight loss technique and adsorption isotherms. OPEFB extract and powder were prepared at various concentrations of 0.2%, 0.4%, 0.6%, 0.8%, and 1.0% (v/v) and dosages of 0.2, 0.4, 0.6, 0.8, and 1.0 g, respectively. The results showed that OPEFB extract achieved higher inhibition efficiency (IE) at high concentration and short immersion time compared to OPEFB powder. Despite having lower IE, OPEFB powder seemed to have better behavior; 6.6% IE increment at longer immersion time, gradual release of active compounds and stronger adsorption capacity. Fourier transform infrared (FTIR) and energy-dispersive X-ray studies confirmed the presence of active compounds in OPEFB extract and powder that is responsible for inhibition. Thermodynamic study revealed that both OPEFB extract and powder obeyed Langmuir isotherm and worked through physical adsorption.Overall, OPEFB powder is concluded to have better performance as corrosion inhibitor compared with OPEFB extract. K E Y W O R D Sacid corrosion, acid solutions, corrosion inhibitor, mild steel

Innovative Method for Longer Effective Corrosion Inhibition Time: Controlled Release Oil Palm Empty Fruit Bunch Hemicellulose Inhibitor Tablet

“…The structural make up of OPEFB cell walls, lignocellulose, consists of a complex matrix of cellulose, hemicellulose and lignin. In our previous study, we have discovered the outstanding performances of OPEFB raw fiber and extract as corrosion inhibitor for mild steel in acidic solution, which was primarily due to the existence of various chemical moieties in its structure [ 16 , 17 ].…”

Experimental and Theoretical Studies of α-Linolenic Acid as Green Corrosion Inhibitor for Carbon Steel in 0.5 M Sulfuric Acid

“…For the particular case of iron and steel, there exist a high number of synthetic inhibitors [ 4 , 5 , 6 ]; however, they have the main drawback that they are toxic, harmful for the environment and humans and are very expensive. Thus, there is an increasing need to use more environmentally friendly corrosion inhibitors, such as those obtained from plant seeds, leaves, roots, etc., which are called “naturally occurring corrosion inhibitors” [ 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 ]. In the last decade, an extensive number of research works related to these kinds of substances have been published.…”