scholarly journals Studi Penambahan Inhibitor Organik Ekstrak Daun Bawang Tiwai (Eleutherine americana Merr.) pada Baja API 5L dalam Lingkungan 3,5% NaCl

2018 ◽  
Vol 2 (3) ◽  
pp. 1
Author(s):  
Yunita Triana ◽  
Sari Shaimah Rinda ◽  
Awali Jatmoko ◽  
Sulistijono Sulistijono
Keyword(s):  
Corrosion Rate ◽  
Corrosion Test ◽  
Immersion Time ◽  
Test Results ◽  
Inhibitor Concentration ◽  
Corrosive Media ◽  
Polarization Measurements ◽  
Inhibitory Efficiency ◽  
Eleutherine Americana ◽  
Organic Inhibitor

One that can be used as an organic inhibitor is bawang tiwai leaves extract. This study used 3.5% NaCl as corrosive media with inhibitor concentration of bawang tiwai leaves extract from 0 ppm to 500 ppm and immersion time from 10 days up to 30 days. The efficiency of inhibition was measured using a weight loss corrosion test, while the corrosion rate was obtained from polarization measurements. The FTIR test results show that the extract contains flavonoid compounds that act as antioxidants and inhibit corrosion. Inhibitory efficiency achieved up to 95.4545% for the addition of 300 ppm inhibitor and 20 days of immersion time. This inhibitory behavior is also supported by polarization measurements where the lowest corrosion rate of 0.00128 mm/year is obtained at the same concentration and immersion time.

scholarly journals Efficiency of Ketapang (Terminalia catappa L.) Leaves Tannin Extract as Organic Inhibitor Against Corrosion Rate of Iron Metal in Seawater

2020 ◽  
Vol 2 (1) ◽  
pp. 63-69
Author(s):  
Eddy Marlianto
Keyword(s):  
Corrosion Rate ◽  
Immersion Time ◽  
Leaf Extract ◽  
Sea Water ◽  
Corrosive Media ◽  
Terminalia Catappa ◽  
Iron Metal ◽  
Ferrous Metals ◽  
Seawater Environment ◽  
Organic Inhibitor

The research is about effect of immersion time and mechanical properties on the rate of corrosion of ferrous metals by the addition of Ketapang (Terminalia catappa L.) leaf extract as an organic inhibitor in the seawater environment. In this study, ketapang leaf extract was used as a natural inhibitor to inhibit the rate of corrosion of ferrous metals. This inhibitor is used on iron metal plates which are immersed in corrosive media, namely sea water with variations in the composition of the inhibitors used at 0; 10% V; 20% V, and 40% V, with immersion time of 3 and 6 days. The characterizations tested included measurement of density, corrosion rate, inhibitor efficiency, and hardness testing using the Vickers method. From the measurement results, the density value decreases with the addition of the concentration of the inhibitor both on immersion 3 days and 6 days. The value of hardness increases with increasing composition of the inhibitor. The optimum hardness value is 165.03 N/m2 with immersion time of 6 days at an inhibitor concentration of 40% and a minimum hardness value of 145.603 N/m2 on immersion 6 days with no inhibitor. The smallest corrosion rate was obtained by samples with a composition of 40% inhibitor of 2.77 mpy with immersion time of 3 days and 1.33 mpy with immersion time of 6 days. And the efficiency value of Ketapang leaf extract inhibitors reached 47.01 % in the composition of 40% in the seawater environment with immersion time of 6 daysketapang leaves

scholarly journals PEMANFAATAN TEH SEBAGAI BIOINHIBITOR KOROSI PEGAS DAUN

2018 ◽  
Vol 2 (2) ◽  
Author(s):  
Nani Mulyaningsih ◽  
Sigit Mujiarto ◽  
Gyani Ubaydilah
Keyword(s):  
Corrosion Rate ◽  
Environmental Conditions ◽  
Corrosion Test ◽  
Corrosion Inhibitors ◽  
Environmentally Friendly ◽  
Antioxidant Compounds ◽  
Test Results ◽  
Inhibitor Concentration ◽  
Leaf Springs

Leaf springs, especially in cars, are one of the metal components that must get attention because their location under the vehicle causes susceptibility to corrosion due to environmental conditions. Corrosion is an absolute phenomenon that occurs in metals, but corrosion can be controlled by speed with certain techniques. One of them is the use of environmentally friendly corrosion inhibitors (bioinhibitors). Tea is known to have high antioxidant compounds, but its use is only limited as a drink ingredient. Starting from these problems, a study was conducted on the use of tea as a bioinhibitor in leaf pegs. This study use variations in inhibitor concentration (15%, 20%, 25%). To determine the corrosion rate a corrosion test was carried out. The test results showed that tea proved to be able to reduce the highest corrosion rate at concentration 25% in the amount of .37%. Corrosion rate before being given an inhibitor of 3.8195 mm / y and after being given inibitor decreased to 3.4614 mm / y.

The Influence of Adding Bio Inhibitor Sarang Semut (Myrmecodia pendans) to Carbon Steel API 5L Grade B in Solution of HCl 1 M

2015 ◽  
Vol 1123 ◽  
pp. 187-191 ◽  
Author(s):  
Atria Pradityana ◽  
Sulistijono ◽  
Abdullah Shahab
Keyword(s):  
Carbon Steel ◽  
Corrosion Rate ◽  
Electrochemical Impedance ◽  
Rapid Development ◽  
Inhibition Mechanism ◽  
Test Results ◽  
X Ray Diffraction ◽  
Corrosive Media ◽  
Concentrate Level ◽  
Control Corrosion

Inhibitor is generally known as one of many alternatives to control corrosion rate. These days, there is the rapid development in which finding inhibitor made from natural ingredient that is really eco-friendly. This research use type of sarang semut, Myrmecodia Pendans (MP), as bio inhibitor with concentrate level for about 0-500 mg/L and also using the material of carbon steel API 5L Grade B, and HCl 1 M as such corrosive media. The affectivity of bio inhibitor is generally known through such calibration which is called as Weight Loss, Potentiodynamic Polarization Test, Electrochemical Impedance Spectroscopy Test, and X-Ray Diffraction Test. The test results show that when it is added with bio inhibitor, there is the decreasing of corrosion rate from 109.88 mpy to 39.294 mpy in concentration level of 500 mg/L. Inhibition mechanism occurred is that there is the formation of a thin layer on the metal surface. Meanwhile, the XRD results show that there are compounds of Fe, FeCl3 and FeOCl in carbon steel API 5l Grade B.

scholarly journals PENGARUH DAUN JAMBU BIJI SEBAGAI INHIBITOR KOROSI ALAMI RANTAI KAPAL

2019 ◽  
Vol 3 (1) ◽  
Author(s):  
Nani Mulyaningsih ◽  
Sigit Mujiarto ◽  
Gyani Ubaydilah
Keyword(s):  
Corrosion Rate ◽  
Corrosion Test ◽  
Immersion Time ◽  
Leaf Extract ◽  
Sea Water ◽  
Polarization Method ◽  
Inhibitor Efficiency ◽  
Organic Inhibitors ◽  
Guava Leaf ◽  
Effect Of Inhibitors

Corrosion is the interaction of metals with their environment which results in damage to metals. Corrosion can also occur in the chain of vessels that are usually located on the side of the ship's hull and are directly exposed to sea water. If it is not properly observed, the condition will damage and reduce the life of the ship chain. It is necessary to add inhibitors as substances to inhibit the corrosion rate. Inhibitors that are generally used are inhibitors that have toxic properties to the environment, therefore it is necessary to use organic inhibitors that do not damage the environment. The purpose of this study was to determine the effect of inhibitors of guava leaf extract on the corrosion rate of ship chains. This research was conducted by immersing specimens with concentrations of 6%, 9%, 12%, and immersion time of 1 hour. Corrosion rate is calculated using the dynamic potentiary polarization method. After calculating the corrosion rate, the inhibitor efficiency is calculated. After immersion is obtained, the inhibitor has an influence. This was shown after the corrosion test found that at a concentration of 9% inhibitors of guava leaf extract was able to reduce the corrosion rate of 0.066 mpy and has the highest efficiency value of 97.3%

scholarly journals Corrosion Rate of Black Chromium Coating Result of Electroplating on Copper

2021 ◽  
Vol 7 (2) ◽  
pp. 128
Author(s):  
Syamsul Hadi ◽  
Sza Sya Monica Valeria ◽  
Satworo Adiwidodo ◽  
Utsman Syah Amrullah ◽  
R.N. Akhsanu Takwim ◽  
...  
Keyword(s):  
Corrosion Rate ◽  
Corrosion Test ◽  
Immersion Time ◽  
Test Methods ◽  
Chromium Coating ◽  
Solution Temperature ◽  
Aesthetic Value ◽  
Corrosive Solution ◽  
Electroplating Process ◽  
The Relationship

The problem faced is that the white chromium coating has a low selling value or aesthetic value than the black chromium layer which is more in demand, especially by the younger generation who prioritizes aesthetics. The purpose of the corrosion test was to determine the corrosion resistance ability of the black chromium coating resulting from the electroplating process on the relationship between the solution temperature and the immersion time of copper in a corrosive solution. Corrosion test methods include literature studies, field observations, weighing specimens, immersing specimens in corrosive solutions, weighing specimens, calculating corrosion rates, and data analyzing. Corrosion test results show that the higher the temperature of the solution and the longer the immersion time, the smaller the corrosion rate for the lowest conditions at 30oC and a duration of 5 minutes with a corrosion rate of 0.2004 mm/year and the highest conditions at a temperature of 50oC and a duration of 9 minutes at a rate of corrosion of 0.0108 mm/year.

Application of Seeds from Psidium Guajava as Organic Inhibitor

2020 ◽  
Vol 867 ◽  
pp. 103-108
Author(s):  
Atria Pradityana ◽  
Subowo ◽  
Hari Subiyanto ◽  
Eddy Widiyono ◽  
Dwi Winarto Gathot
Keyword(s):  
Weight Loss ◽  
Corrosion Rate ◽  
Potentiodynamic Polarization ◽  
Inhibition Efficiency ◽  
Psidium Guajava ◽  
Test Material ◽  
Corrosive Media ◽  
Surrounding Environment ◽  
Organic Inhibitors ◽  
Organic Inhibitor

Corrosion is the process of natural changes in the nature of a material due to the influence or reaction with the surrounding environment. One way to control it is by adding inhibitors. In this study, seeds from guava (Psidium Guajava) were used as organic inhibitors. The test material used is API 5L grade B steel. For corrosive media, a solution of 1 M H2SO4 is used. In experiments used variations in the concentration of extracts 0, 2, 3, 4, 5 and 6 ml. The results of the experiments showed a decrease in the corrosion rate of API 5L grade B when there were additional inhibitors. This is supported by the experimental results of Potentiodynamic Polarization. The rate of corrosion without the presence of an inhibitor shows 75,018 mmpy whereas in the presence of 2,8845 mmpy inhibitors. Based on the calculation, the inhibition efficiency is 96.155%. This is also indicated by the results of the testing of weight loss that has been done. The efficiency shown is 90.130%.

scholarly journals Corrosion rate of AA 7050 in 3.5% NaCl environment with sodium chromate (Na2CrO4) inhibitor variation

2018 ◽  
Vol 197 ◽  
pp. 12002
Author(s):  
Pramesti A D Wulandari ◽  
M Noer Ilman
Keyword(s):  
Corrosion Rate ◽  
Tensile Test ◽  
Aluminium Alloy ◽  
Corrosion Test ◽  
Hardness Test ◽  
Transverse Plane ◽  
Sodium Chromate ◽  
Test Results ◽  
Nacl Solution ◽  
Metallographic Examination

Aluminium alloy 7050 is widely used for aerospace applications due to its excellent mechanical properties. However, when the airplane is operated and exposed by the corrosive environment, alumina layer of aluminium is not thick enough to provide protection. Therefore, corrosion protection method in the airplane needs to be improved. In the recent experiments, corrosion process in the airplane could be inhibited by corrosion inhibitors that are mixed with a protective coating. In this current study, the effect of sodium chromate inhibitor on the corrosion rate of aluminium alloy AA 7050 has been investigated. The 7050 aluminium alloys in this experiment were machined into specimens for the tensile test, hardness test, corrosion test and metallographic examination. The corrosion test was performed in 3.5% NaCl solution containing 0.1%, 0.3%, 0.5%, 0.7% sodium chromate inhibitor and the results have been compared with the corrosion rate in 3.5% NaCl solution as reference. The tensile test results showed that the ultimate and yield strength were 527.36 MPa and 481.42 MPa. Hardness test results were 175.36 VHN on the short transverse plane, 164.43 VHN on the long transverse plane, and 164.23 VHN on the longitudinal plane. This experimental study can be concluded that the corrosion rate of material decreases with increasing of Na2CrO4 concentration in the solution.

Sign in / Sign up

Export Citation Format

Share Document