STUDY OF NEPHELIUM LAPPACEUM (RAMBUTAN) EXTRACTS AS CORROSION INHIBITOR FOR STEEL IN HCL 1 M SOLUTION: GRAVIMETRIC METHOD

Corrosion causes economic losses as reported by NACE in 2016 that the global cost of corrosion was US$2.5 billion, equivalent to 3.4% of world GDP. In addition, corrosion also causes environmental impacts such as causing casualties and environmental pollution. Various methods are used to control...

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Main Author: Firmansyah Putra, Ferry
Format: Final Project
Language:Indonesia
Online Access:https://digilib.itb.ac.id/gdl/view/57960
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Institution: Institut Teknologi Bandung
Language: Indonesia
id id-itb.:57960
spelling id-itb.:579602021-08-28T18:22:12ZSTUDY OF NEPHELIUM LAPPACEUM (RAMBUTAN) EXTRACTS AS CORROSION INHIBITOR FOR STEEL IN HCL 1 M SOLUTION: GRAVIMETRIC METHOD Firmansyah Putra, Ferry Indonesia Final Project corrosion inhibitor, green inhibitor, rambutan, steel INSTITUT TEKNOLOGI BANDUNG https://digilib.itb.ac.id/gdl/view/57960 Corrosion causes economic losses as reported by NACE in 2016 that the global cost of corrosion was US$2.5 billion, equivalent to 3.4% of world GDP. In addition, corrosion also causes environmental impacts such as causing casualties and environmental pollution. Various methods are used to control corrosions, one of the most common method is corrosion inhibitors. Conventional corrosion inhibitors have several problems such as being relatively expensive and toxic. Currently, many studies have been carried out related to environmentally friendly inhibitors that can overcome this problem, one of which comes from plants. Organic compounds in plants such as tannins and flavonoids have the ability to inhibit corrosion. Rambutan is known to contain these compounds. This research was conducted to determine the corrosion inhibition of steel using rambutan peel extract in a 1 M HCl environment using the gravimetric method. In this study, the immersion test was carried out for two days at room temperature and six hours for temperature variations of 35?, 45?, and 55? and with inhibitor concentrations of 0, 1, 2, 3, and 4 g/l. Extraction method with ethanol solvent was carried out to obtain rambutan peel extract, then diluted with HCl 1 M solution. The results of the immersion test were then processed to obtain the corrosion rate, inhibition efficiency, adsorption isotherm model, thermodynamic parameters, and adsorption mechanism. The results showed that the increase in inhibitor concentration decreased the corrosion rate and increased the inhibition efficiency. The lowest corrosion rate and the highest efficiency at immersion for two days at room temperature were 1.001 mm/year and 89.59% obtained at a concentration of 3 g/l. Increasing the temperature increases the corrosion rate and decreases the inhibition efficiency. The decrease in inhibition efficiency with increasing temperature indicates a physisorption mechanism. The adsorption isotherm models for temperatures of 25-55? are Langmuir, Frumkin, Freundlich, and Frumkin, respectively. Gibbs energy values ranged from -15.46 to -24.86 kJ/mol indicating the physisorption mechanism and the combination of physisorption and chemisorption. The increase in activation energy along with the addition of inhibitor concentration indicates a physisorption mechanism. text
institution Institut Teknologi Bandung
building Institut Teknologi Bandung Library
continent Asia
country Indonesia
Indonesia
content_provider Institut Teknologi Bandung
collection Digital ITB
language Indonesia
description Corrosion causes economic losses as reported by NACE in 2016 that the global cost of corrosion was US$2.5 billion, equivalent to 3.4% of world GDP. In addition, corrosion also causes environmental impacts such as causing casualties and environmental pollution. Various methods are used to control corrosions, one of the most common method is corrosion inhibitors. Conventional corrosion inhibitors have several problems such as being relatively expensive and toxic. Currently, many studies have been carried out related to environmentally friendly inhibitors that can overcome this problem, one of which comes from plants. Organic compounds in plants such as tannins and flavonoids have the ability to inhibit corrosion. Rambutan is known to contain these compounds. This research was conducted to determine the corrosion inhibition of steel using rambutan peel extract in a 1 M HCl environment using the gravimetric method. In this study, the immersion test was carried out for two days at room temperature and six hours for temperature variations of 35?, 45?, and 55? and with inhibitor concentrations of 0, 1, 2, 3, and 4 g/l. Extraction method with ethanol solvent was carried out to obtain rambutan peel extract, then diluted with HCl 1 M solution. The results of the immersion test were then processed to obtain the corrosion rate, inhibition efficiency, adsorption isotherm model, thermodynamic parameters, and adsorption mechanism. The results showed that the increase in inhibitor concentration decreased the corrosion rate and increased the inhibition efficiency. The lowest corrosion rate and the highest efficiency at immersion for two days at room temperature were 1.001 mm/year and 89.59% obtained at a concentration of 3 g/l. Increasing the temperature increases the corrosion rate and decreases the inhibition efficiency. The decrease in inhibition efficiency with increasing temperature indicates a physisorption mechanism. The adsorption isotherm models for temperatures of 25-55? are Langmuir, Frumkin, Freundlich, and Frumkin, respectively. Gibbs energy values ranged from -15.46 to -24.86 kJ/mol indicating the physisorption mechanism and the combination of physisorption and chemisorption. The increase in activation energy along with the addition of inhibitor concentration indicates a physisorption mechanism.
format Final Project
author Firmansyah Putra, Ferry
spellingShingle Firmansyah Putra, Ferry
STUDY OF NEPHELIUM LAPPACEUM (RAMBUTAN) EXTRACTS AS CORROSION INHIBITOR FOR STEEL IN HCL 1 M SOLUTION: GRAVIMETRIC METHOD
author_facet Firmansyah Putra, Ferry
author_sort Firmansyah Putra, Ferry
title STUDY OF NEPHELIUM LAPPACEUM (RAMBUTAN) EXTRACTS AS CORROSION INHIBITOR FOR STEEL IN HCL 1 M SOLUTION: GRAVIMETRIC METHOD
title_short STUDY OF NEPHELIUM LAPPACEUM (RAMBUTAN) EXTRACTS AS CORROSION INHIBITOR FOR STEEL IN HCL 1 M SOLUTION: GRAVIMETRIC METHOD
title_full STUDY OF NEPHELIUM LAPPACEUM (RAMBUTAN) EXTRACTS AS CORROSION INHIBITOR FOR STEEL IN HCL 1 M SOLUTION: GRAVIMETRIC METHOD
title_fullStr STUDY OF NEPHELIUM LAPPACEUM (RAMBUTAN) EXTRACTS AS CORROSION INHIBITOR FOR STEEL IN HCL 1 M SOLUTION: GRAVIMETRIC METHOD
title_full_unstemmed STUDY OF NEPHELIUM LAPPACEUM (RAMBUTAN) EXTRACTS AS CORROSION INHIBITOR FOR STEEL IN HCL 1 M SOLUTION: GRAVIMETRIC METHOD
title_sort study of nephelium lappaceum (rambutan) extracts as corrosion inhibitor for steel in hcl 1 m solution: gravimetric method
url https://digilib.itb.ac.id/gdl/view/57960
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