scholarly journals PEMANFAATAN EKSTRAK DAUN BIDURI (Calotropis gigantae) SEBAGAI INHIBITOR KOROSI PADA BAJA LUNAK (Mild Steel) DALAM BERBAGAI MEDIUM KOROSIF

2021 ◽  
Vol 1 (3) ◽  
pp. 84
Author(s):  
Alfathan Anshori ◽  
Ishak Ishak ◽  
Jalaluddin Jalaluddin ◽  
Syamsul Bahri ◽  
Zulnazri Zulnazri
Keyword(s):  
Mild Steel ◽  
Calotropis Gigantea

Penelitian ini bertujuan untuk mengetahui pengaruh penambahan inhibitor daun biduri (Calotropis gigantea) pada baja karbon rendah (mild steel), untuk menganalisa pengaruh konsentrasi inhibitor dari ekstrak daun biduri terhadap berbagai medium korosif yaitu air laut, HNO3 0,1 N dan CH3COOH 0,1 N dan untuk menganalisa pengaruh berbagai medium korosif terhadap laju korosi baja karbon, untuk menganalisa pengaruh konsentrasi inhibitor dari ekstrak daun biduri terhadap laju korosi. Laju korosi dihitung dengan menggunakan metode kehilangan berat. Konsentrasi inhibitor yang digunakan yaitu 0 ppm (kondisi blanko), 200 ppm, 250 ppm, 300 ppm dan 350 ppm. Lama perendaman dijadikan sebagai variabel tetap yaitu selama 30 hari. Hasil kajian menunjukkan bahwa ekstrak daun biduri dapat digunakan sebagai bio-inhibitor korosi pada plat baja lunak (mild steel). Laju korosi terendah yaitu pada medium korosif air laut dengan penambahan konsentrasi inhibitor sebanyak 400 ppm yaitu sebesar 8,374 mpy, sedangkan laju korosi tertinggi yaitu pada medium korosif asam nitrat (HNO3) 0,1 N dengan tanpa adanya penambahan konsentrasi inhibitor yaitu sebesar 31,013 mpy. Hal ini menunjukkan bahwa penambahan tanin dari ekstrak daun biduri dapat mengurangi laju korosi.

The Effects of Carbonate-Bicarbonate Concentration on Empirical Corrosion Diagram of Mild Steel as a Material of Geological Disposal Package for High Level Nuclear Wastes

1996 ◽  
Vol 451 ◽  
Author(s):  
Guen Nakayama ◽  
Yuichi Fukaya ◽  
Masatsune Akashi
Keyword(s):  
Mild Steel ◽  
Human Life ◽  
General Corrosion ◽  
Nuclear Wastes ◽  
Bicarbonate Concentration ◽  
Sulfate Ions ◽  
Geological Disposal ◽  
Groundwater Environment ◽  
High Level ◽  
Corrosion Diagram

ABSTRACTIn the scheme for geological disposal of high level radioactive nuclear wastes, the burial pit is to be isolated from the sphere of human life by a multiple-barrier system, which consists of an artificial barrier, composed of a canister, an overpack and a bentonite cushioning layer, and a natural barrier, which is essentially the bedrock. As the greatest as well as essentially the sole detriment to its integrity would be corrosion by groundwater. The groundwater comes to it seeping through the bentonite zone, thereby attaining conceivably the pH of transition from general corrosion to passivity, pHd, the behaviors of mild steel in such a groundwater environment have been examined. It has been shown that the pHd is lowered (enlargement of the passivity domain) with rising temperature and carbonate-bicarbonate concentration, while it is raised (enlargement of the general corrosion region) with increasing concentrations of chloride and sulfate ions.

Experimental Parametric Investigations of AST37 Mild Steel Welds

2015 ◽  
Vol 5 (2) ◽  
pp. 14-21
Author(s):  
Ch.Siva RamaKrishna ◽  
◽  
Gurijala Venkata Avinash ◽  
Keyword(s):  
Mild Steel ◽  
Steel Welds

Corrosion Studies of Mild Steel in 1M HCL by Using 1-(2- Methyl-4-(2-Methylphenyldiazenyl) Phenyl) Azonapthalen-2-Ol as Organic Inhibitor

2018 ◽  
Vol 8 (10) ◽  
pp. 1142-1148
Author(s):  
Nathaniel Raj ◽  
Vijaya Kumar Durg ◽  
Pruthviraj R D ◽  
Vishwaprakash Vishwaprakash
Keyword(s):  
Mild Steel ◽  
Corrosion Studies ◽  
Organic Inhibitor
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