Pengaruh Penambahan Inhibitor Ekstrak Kopi Dan Waktu Perendaman Terhadap Laju Korosi Pada Baja Karbon Aisi 1020 Dalam Larutan Nacl 3%

Simanjuntak, Hartono; Ginting, Ediman; Suprihatin, Suprihatin

doi:10.23960/jtaf.v7i2.2109

Cited by 3 publications

(3 citation statements)

References 3 publications

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“…In addition to the presence of H + ions, in the HCl solution, there are Clions which are very aggressive towards the element iron in metals. Clions will attract the Fe element to the metal so that the metal is attacked by corrosion and becomes rusty [20]. So the content of bitter leaf inhibitors is less effective in dealing with ion attack on HCl medium when compared to the results in well water.…”

Section: Resultsmentioning

confidence: 99%

The effect of sambiloto leaf (Andrographis paniculata Nees) extract inhibitor concentration on the corrosion rate of iron in the corrosive HCl medium and well water

2023

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Corrosion is a chemical reaction between metal and chemical substances in free air influenced by typographical conditions, climate, and humidity levels around the metal object. If left unchecked, it can cause damage to the metal infrastructure, material losses, and harm in terms of safety and security. Therefore, a way to inhibit corrosion is needed by creating an environmentally friendly inhibitor from natural materials. One of them is by utilizing Sambiloti leaf as a natural inhibitor. Sambiloto leaves contain tannins which can inhibit corrosion well. This study aimed to determine the efficiency of Sambiloto leaves ethanol extract in inhibiting the corrosion rate of metals in the corrosive medium of well water. HCl was soaked for seven days to determine the correlation between the corrosion rate and extract concentration in different corrosive media. Sambiloto leaves were extracted using the soxhletation method using 96% ethanol solution, then distilled to obtain a pure extract. Sambiloto leaf extract was then varied in concentration, namely 1%, 5%, 10%, and 15%. The corrosive medium is well water and HCl, and the metal material used is nails. The results showed that adding Sambiloto extract with a concentration of 15% in both corrosive mediums had the highest inhibitor efficiency values, namely 97.32% in the corrosive HCl medium and 69.3% in the corrosive well water medium. The results of the regression analysis showed that the addition of Sambiloto extract had a significant effect on the corrosion rate in well water media. In contrast, in the HCl medium, the addition of Sambiloto extract did not significantly affect the corrosion rate.

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Section: Resultsmentioning

confidence: 99%

The effect of sambiloto leaf (Andrographis paniculata Nees) extract inhibitor concentration on the corrosion rate of iron in the corrosive HCl medium and well water

2023

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“…Table 2 shows the percentages of components in the sample that contain carbon (C), oxygen (O), and iron (Fe), all of which are corrosion products. Sample St37 3.15 has fewer elements of O and Fe than sample St37 12.15, which has more components of O and Fe (Simanjuntak et al, 2019). The corroded samples were dominated by O and Fe content, with the St37 12.15 sample containing a more significant element when the inhibitor's capacity to shield the sample from corrosion began to decline, or the inhibitor was already in a saturated state (Nurhayati et al, 2020).…”

Section: Analysis Of Scanning Electron Microscopy (Sem) and Energy Di...mentioning

confidence: 99%

The Effect of Immersion Time on Corrosion Rate on St37 Carbon Steel in 3% NaCl Corrosive Medium Using Waru Leaves Extract Inhibitor

Sinaga,

Suka,

Karo

2023

J. Energy Mater. Instrum. Technol.

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The research of effect of immersion time on the corrosion rate of St37 carbon steel has been conducted in a 3% NaCl corrosive medium using a hibiscus leaves extract inhibitor. The samples of carbon steel St37 were immersed in a corrosive medium of NaCl 3% without being given and given the inhibitor of hibiscus leaf extract with a concentration of 15% for 3, 6, 9, and 12 days. Calculation of reduction in corrosion rate is carried out by the weight loss method. The results showed that adding the hibiscus leaves extract inhibitor effectively reduced the sample's corrosion rate with the most excellent efficiency at nine days immersion, which was equal to 78,48%. The results of XRD characterization show that the phase formed is pure Fe is a corrosion product. The results of SEM characterization showed that the surface microstructure of the sample after immersion was cracks, holes, and lumps, which indicated that the sample had been corroded. The results of EDS characterization show that in the soaked sample, there were corrosion products in the form of FeO compounds whose magnitude increased with every immersion.

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“…Hipotesis adalah kesimpulan teoritis yang masih harus dibuktikan kebenarannya melalui pembuktian dari hail penelitian, maka hipotesis ini dapat benar atau salah, dapat diterima atau ditolak. M. Simanjuntak (2019), definisi hipotesis ialah "pernyataan tentative yang merupakan dugaan mengenai apa saja yang sedang kita amati dalam usaha untuk memahaminya. Menurut Sugiono (2008), hipoteisis merupakan jawaban sementara terhadap rumusan masalah penelitian, oleh karena itu rumusan masalah biasanya disusun dalam bentuk kalimat asumsi atau praduga.…”

Section: Tinjauan Literaturunclassified

Pengaruh Pertukaran Pimpinan-Anggota (Leader Member Exchange) terhadap Kinerja Pegawai dimediasi Kualitas Kerja pada Dinas Perikanan Kabupaten Teluk Wondana

Maniani,

Husen,

Rasyid

2023

Prosiding Seminar Nasional FMI

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The aim of this research is to analyze the influence of Leader Member Exchange on Employee Performance Mediated by Work Quality at the Fisheries Service, Teluk Wondama Regency, West Papua Province. This research is included in the category of causal research using a quantitative approach. Causal research is research that wants to see whether a variable that acts as an independent variable has an effect on another variable that is the dependent variable. The population in this study was all staff of the Teluk Wondama Regency Fisheries Service. Data were analyzed using path analysis with the Structural Equation Model (SEM PLS) version 4 program, with a sample size of 54 employees at the Fisheries Service of Teluk Wondama Regency, West Papua Province. The research results can be concluded that Leader Member Exchange has a significant effect on Employee Performance with a T-Statistic value of 5.196, P-Value 0.000, LMX has a significant effect on Work Quality with a T-Statistic value of 3.294, P-Value 0.001, Work Quality has a Significant Influence on Employee Performance with a T-Statistic value of 7.100, P-Value 0.000, LMX has a significant effect on Employee Performance through Work Quality as a Mediating variable at the Fisheries Service of Teluk Wondama Regency, West Papua Province with a t-Statistic value of 3.369, P-Value 0.000.

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Pengaruh Penambahan Inhibitor Ekstrak Kopi Dan Waktu Perendaman Terhadap Laju Korosi Pada Baja Karbon Aisi 1020 Dalam Larutan Nacl 3%

Cited by 3 publications

References 3 publications

The effect of sambiloto leaf (Andrographis paniculata Nees) extract inhibitor concentration on the corrosion rate of iron in the corrosive HCl medium and well water

The effect of sambiloto leaf (Andrographis paniculata Nees) extract inhibitor concentration on the corrosion rate of iron in the corrosive HCl medium and well water

The Effect of Immersion Time on Corrosion Rate on St37 Carbon Steel in 3% NaCl Corrosive Medium Using Waru Leaves Extract Inhibitor

Pengaruh Pertukaran Pimpinan-Anggota (Leader Member Exchange) terhadap Kinerja Pegawai dimediasi Kualitas Kerja pada Dinas Perikanan Kabupaten Teluk Wondana

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