scholarly journals Effect of Temperature Changes on Corrosion Rate in Motorcycle Exhausts

2021 ◽  
Vol 3 (2) ◽  
pp. 59-68
Author(s):  
Ade Afriadi AR ◽  
Remon Lapisa ◽  
Retno Wahyudi
Keyword(s):  
Heat Treatment ◽  
Experimental Study ◽  
Weight Loss ◽  
Corrosion Rate ◽  
Weight Reduction ◽  
Salt Water ◽  
Effect Of Temperature ◽  
Plain Water ◽  
Initial Weight ◽  
Temperature Changes

This study aims to determine the effect of temperature changes on the corrosion rate of motorbike exhaust. In this experimental study, the test specimens were given heat treatment by burning directly using solder gas, then immersed directly into a container containing plain water and salt water. After being given the treatment, an evaluation was held to see how much influence it had. On the 12th day of testing, all specimens experienced a decrease in weight, with details in specimen A experiencing a weight loss of 0.5 grams from the initial weight of 32 grams, with a corrosion rate of 0.064942241mm / year. Specimen B experienced a weight loss of 0.31 grams from the initial weight of 32 grams and the corrosion rate in specimen B was 0.402641894 mm / year. In specimen C, it experienced a weight reduction of 0.46 grams from the initial weight of 32 grams with a corrosion rate of 0.59746862mm / year. Penelitian ini bertujuan untuk melihat pengaruh perubahan temperatur terhadap laju korosi pada knalpot sepda motor. Pada penelitian eksperimen ini spesimen uji diberi perlakuan panas dengan dibakar langsung menggunakan solder gas, kemudian dicelupkan langsung kedalam wadah yang berisi air biasa dan air garam. Setelah diberi perlakuan (treatment), diadakan evaluasi untuk melihat seberapa besar pengaruhnya. Pada hari ke 12 pengujian seluruh spesimen mengalami penurunan berat, dengan rincian pada specimen A mengalami penurunan berat sebesar 0,5gram dari berat awal 32gram, dengan laju korosi 0,064942241mm/tahun. Spesimen B mengalami penurunan berat sebesar 0,31gram dari berat awal 32 gram dan laju korosi pada spesimen B 0,402641894 mm/tahun. Pada sepesimen C mengalami pengurangan berat sebesar 0,46 gram dari berat awal 32 gram dengan laju korosi 0,59746862mm/tahun.

scholarly journals Kinetics of mass transfer during osmotic dehydration of auyama (Caribbean pumpkin) in ternary solutions

DYNA ◽  
2019 ◽  
Vol 86 (209) ◽  
pp. 120-125
Author(s):  
Jhonatan Andres Rodriguez Manrique ◽  
Angélica Maria Torregroza Espinosa ◽  
Rodrigo Daniel Salgado Ordosgoitia
Keyword(s):  
Mass Transfer ◽  
Weight Loss ◽  
Diffusion Coefficient ◽  
Weight Reduction ◽  
Osmotic Dehydration ◽  
Salt Water ◽  
Solid Gain ◽  
Processing Times ◽  
Ternary Solutions ◽  
Kinetics Of

The aim of this study was to address the modeling of aspects such as weight reduction (WR), solid gain (SG) and weight-loss (WL) in Caribbean pumpkin samples osmotically dehydrated in ternary solutions. For this purpose, osmotic dehydration was carried out using two ternary solutions: stevia-salt-water (S1) and glucose-salt-water (S2) at different concentrations (20%, 30% and 40% w/w), and processing times of 40 min, 80 min, 120 min, and 160 min. Also, the diffusion coefficient was determined and the analysis of variance with orthogonal polynomials was performed to find the best treatment for dehydration of auyama samples (p≤0.05). The results suggest that the solution constituted by stevia-salt-water, allows greater reduction of weight and gain of solids when a concentration of 40% is used at a time of 78.12min until reaching a humidity percentage of 60.06%. Similarly, the values of the diffusion coefficient for this solution ratify that the increase in concentration generates less resistance to mass transfer.

Application of mathematical tools and techniques in monitoring and predicting stainless steel corrosion in river water media environment

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Weight Loss ◽  
Stainless Steel ◽  
Corrosion Rate ◽  
Fresh Water ◽  
Salt Water ◽  
Aqueous Media ◽  
Water Environment ◽  
Quadratic Model ◽  
Tools And Techniques ◽  
Fresh Water Environment

The application of mathematical tools and techniques were applied in the process of monitoring and predicting the corrosion rate and weight loss of stainless steel in salt and fresh water environment of Niger Delta region in Nigeria. The functional parameters used in the mathematical demonstration to compute the corrosion rate and weight loss were obtained from the experimental data and these functional coefficients were fitted into the power and quadratic model. The experimental corrosion rate and weight loss value was compared with the theoretical computed value for both model of quadratic and power concept approach and the result obtained demonstrate a good match indicating the reliability of the concepts on monitoring and predicting the process. In this case, the corrosion rate and weight loss was experienced to be more rapid in the salt water environment than the fresh water environment; this can be attributed to the characteristics of the salt water concentration of the physicochemical parameters that is a major contributing factor for increase in corrosion rate and weight of metals in aqueous media.

scholarly journals A 1000 cc Intragastric Balloon for Weight Reduction

1998 ◽  
Vol 5 (1) ◽  
pp. 31-35
Author(s):  
A. Lavy ◽  
J. Lachter ◽  
O. Zinder ◽  
S. Eidelman
Keyword(s):  
Weight Loss ◽  
Weight Reduction ◽  
Intragastric Balloon ◽  
Dietary Therapy ◽  
Morbidly Obese ◽  
Initial Weight ◽  
Initial Weight Loss ◽  
Hormone Levels ◽  
Preliminary Results ◽  
Prolonged Time

Objective: To examine the efficiency of a 1000 cc intragastric balloon as an aid for weight reduction.Subject: Thirty-three morbidly obese persons, after multiple attempts for weight loss.Design: Intragastric 1000 cc balloons were endoscopically inserted into the stomachs of subjects. The balloons were left in place for six months. During that period the patients received dietary therapy. Hormone levels were measured prior to insertion and upon withdrawal of balloons.Results: After a brief initial weight loss, most patients regained the weight initially lost. Mean weight loss after six months was only 8 kg (range 0–22 kg). We found that Bombesin levels, but not Gastrin levels, were significantly lower at the end of therapy than before insertion of the balloon.Conclusion: We conclude that a large intragastric balloon for a prolonged time did not assist in weight loss. Our preliminary results show Bombesin levels change significantly, a finding which warrants further study.

scholarly journals The Effect of Sodium Hydroxide Solutions with Different Ph on the Corrosion Of Iron Alloy (C1010) In Industrial Water

2018 ◽  
Vol 15 (1) ◽  
pp. 6136-6141 ◽  
Author(s):  
Mouayed yousif Kadhum ◽  
Chasib Khaiber Bkhakh ◽  
Muayad Hasan Albehadili
Keyword(s):  
Weight Loss ◽  
Corrosion Rate ◽  
Sodium Hydroxide ◽  
Ph Value ◽  
Iron Alloy ◽  
Corrosion Current ◽  
Effect Of Temperature ◽  
Industrial Water ◽  
Alloy Type ◽  
Corrosion Of Iron

 The effect of increasing pH value in the corrosion of iron alloy type (C1010) was studied in the presence of different pH solutions of sodium hydroxide dissolved in industrial water at 35ËšC  and it was found that the corrosion rate of iron alloy was less at pH of 9.5 . This result was proved by measuring some thermodynamic parameters such as corrosion current and covered surface area that pertain to corrosion using weight loss electrical (Tafel plot ) methods . Also the effect of temperature on the rate of corrosion at ( 25ËšC , 35ËšC and 45ËšC ) at different pH was studied and it was found that the rate of corrosion is increased with increasing the temperature at the same pH.

Temperature effect on nonhydrolytic foaming process

1999 ◽  
Vol 14 (10) ◽  
pp. 4020-4024
Author(s):  
G. S. Grader ◽  
Y. de Hazan ◽  
G. Natali ◽  
T. Dadosh ◽  
G. E. Shter
Keyword(s):  
Heat Treatment ◽  
Thermal Analysis ◽  
Thermal Decomposition ◽  
Weight Loss ◽  
Differential Thermal Analysis ◽  
Analysis Data ◽  
Effect Of Temperature ◽  
Isopropyl Ether ◽  
Foaming Process ◽  
Ether Complex

This paper describes the effect of temperature on the formation of nonhydrolytic alumina foams. The foams are generated by heat treatment of crystals of the aluminum chloride isopropyl ether complex [AlCl3(Pri2O)], with the release of isopropyl chloride (PriCl). The chlorine content in the foams was determined by titration, and their weight loss during sintering was measured by thermogravimetric and differential thermal analysis. Based on these measurements, the condensation degree (CD) in the foams was modeled. The foaming time ranged from several minutes at 70 °C to several seconds at 160 °C. It was found that the chlorine-to-aluminum ratio of the foam (Cl/Al) decreased from 1.79 at 70 °C to 1.56 at 160 °C. Thermogravimetric analysis data confirm that the smaller Cl content gives rise to a smaller weight loss during thermal decomposition, consistent with a higher CD in the foams created at higher temperatures. Finally, about 80% of the PriCl produced during complex decomposition and subsequent –Al–O–Al– condensation reactions is lost during foaming.

scholarly journals Variasi Konsentrasi Inhibitor Ekstrak Buah Harendong (Melastoma Affine D. Don) Pada Baja Per Daun Dengan Perlakuan Panas 300 Dan 700 °C Terhadap Laju Korosi Dalam Larutan NaCl 3%

2019 ◽  
Vol 7 (2) ◽  
pp. 187-196
Author(s):  
Dwi Kurniawan ◽  
◽  
Ediman Ginting Suka ◽  
Suprihatin Suprihatin ◽  
◽  
...  
Keyword(s):  
Crystal Structure ◽  
Heat Treatment ◽  
Weight Loss ◽  
Corrosion Rate ◽  
Surface Area ◽  
Sample Surface ◽  
Sem Analysis ◽  
Inhibitor Concentration ◽  
Fruit Extract ◽  
Eds Analysis

Research on variations in the concentration of inhibitors of harendong extract (Melastoma Affine D. Don) on steel per leaf with heat treatments 300 and 700 °C has been carried out on the corrosion rate in 3% nacl solution.The purpose of this study was to determine the efficiency of harendong fruit extract on the rate of koros in steel per leaf with heat treatment 300 and 700 °C. To determine the corrosion rate, the method of weight loss is used. The results showed that the efficiency of harendong fruit extract on the 5% inhibitor concentration at 300 °C was 90.345%. Based on the results of XRD in the sample Fe obtained with the Orthorombic crystal structure. Based on the results of SEM analysis and EDS the corroded sample surface area was reduced and fewer FeO levels in the sample were reduced. From the results of the corrosion rate and SEM and EDS analysis, it was found that the harendong fruit extract inhibitors were effective in inhibiting the corrosion rate in steel per leaf

scholarly journals The Inhibition Action of Viscum Album Extract on theCorrosion of Carbon Steel in Hydrochloric Acid Solution

2021 ◽  
Vol 11 (6) ◽  
pp. 14344-14358
Keyword(s):  
Weight Loss ◽  
Carbon Steel ◽  
Corrosion Rate ◽  
Plant Extract ◽  
Viscum Album ◽  
Outcome Data ◽  
Effect Of Temperature ◽  
Polarization Data ◽  
Adsorption Free Energy ◽  
Temperature Polarization

Corrosion rate of carbon steel (CS) in 1M HCl was examined in the absence and presence of Viscum album plant extract as a corrosion inhibitor using weight loss, polarization, and impedance techniques. The effect of temperature and extract dose was studied using a weight loss test. The outcome data gained displayed that Viscum album extract plays as an inhibitor for CS in HCl and reduces the corrosion rate. The higher inhibition efficacy reached 96.3% for Viscum album at greater inhibitor doses (300 ppm) and temperature. Polarization data revealed that this extract acts as a mixed kind inhibitor. The surface analysis of CS was checked by different methods, which showed the formation of extract film on the CS surface. The adsorption of Viscum album plant extract was found to obey the Temkin model, and the data of adsorption free energy was more negative than -40 kJ/mol, which means that the adsorption is chemical.

ANALISIS KETAHANAN KOROSI PIPA A53 PADA LINGUNGAN OIL SLUDGE DENGAN METODE C-RING

ROTOR ◽  
2017 ◽  
Vol 10 (1) ◽  
pp. 30
Author(s):  
Rony Agista Apriansyah ◽  
Sumarji Sumarji ◽  
Gaguk Jatisukamto
Keyword(s):  
Weight Loss ◽  
Corrosion Rate ◽  
Strain Hardening ◽  
Cold Working ◽  
Salt Water ◽  
Oil Sludge ◽  
Material Surface ◽  
Piping System ◽  
Bending Load ◽  
Bending Loads

Corrosion is the degradation of the material surface due to reaction with the environment. Steel pipe is one of the materials vulnerable to corrosion because the piping system is always in contact with the outside environment. This research have a purpose to know influence of cold working about corrosion resistance pipe A53 on oil sludge salt water and oil sludge pond environment with c-ring method. Oil sludge is sediment of crude oil thats contain water, sediment, and oil thats can be processed again. The cold working process is carried out by providing bending loads of 114 kg, 140 kg, and 160 kg, and one material without bending. Process of corrosion testing uses weight loss method by weighing the material before it is corroded and after corrosion. Result of test showed that there was an increase of hardness on the material with bending load of 114 kg, 140 kg, and 160 kg respectively of 103.33 BHN, 134.00 BHN, and 187.66 BHN, while the material without bending had a hardness of 93.33 BHN. Corrosion rate on material without bending with oil sludge salt water is 2,12 x 10-2 mmpy while in oil sludge pond equal to 1,67 x 10-2 mmpy. Materials with bending loads of 114 kg, 140 kg, and 160 kg have a corrosion rate of 2.35 x 10-2 mmpy, 2.88 x 10- 2 mmpy, and 4.18 x 10-2 mmpy on oil sludge salt water, and 1.19 x10-2 mmpy, 2.15 x 10-2 mmpy, and 3.09 x 10-2 mmpy on oil sludge pond. Oil sludge of salt water is more reactive than oil sludge pond because it contains sea water composed of NaCl compounds which is a corrosive environment .The given bending load results in strain hardening followed by increased energy on the material so that the corrosion rate increases. Cold treatment provided resulted in cracks on the surface of the material so that the corrosion was localized to the crack and formed pitting. Keywords : A53, Oil Sludge, Strain Hardening, Weight Loss

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