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

Corrosion Rate Analysis of API 5L Gr B Steel Pipe in Acetic Acid Contained Crude Oil Treatment System by Using Amine Base Organik Corrosion Inhibitor

2020 ◽  
Vol 991 ◽  
pp. 191-197
Author(s):  
Adji Swandito ◽  
Viktor Malau
Keyword(s):  
Weight Loss ◽  
Acetic Acid ◽  
Corrosion Rate ◽  
Crude Oil ◽  
Steel Pipe ◽  
Rate Analysis ◽  
Eds Analysis ◽  
Protection Layer ◽  
Product Protection ◽  
Organic Inhibitor

Corrosion is the main problem in the processing of crude oil containing soap emulsion by using acetic acid based demulsifier. This study aims to analyze corrosion of API 5L Gr B steel pipe in the solution of 90% brine and 10% crude oil with addition of 2000 ppm of acetic acid based demulsifier at various concentration of amine based organic inhibitor. Corrosion testing was conducted using weight loss coupon. SEM and EDS analysis were performed to investigate corroded specimen. The weight loss results indicate that amine based organic inhibitor made the steel resistant to corrosion with an inhibitor effectiveness of up to 96.67% at a concentration of 40 ppm. SEM observation following with EDS analysis identifying the presence of inhibitor and corrosion product protection layer.

Study on the Fabrication and Properties of Ni-P Composite Coating

2013 ◽  
Vol 537 ◽  
pp. 265-268
Author(s):  
Zhao An ◽  
Ming Ya Li ◽  
Nian Hao Ge ◽  
Xiao Ying Li ◽  
Qiu Fan Li ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Heat Treatment ◽  
Phase Composition ◽  
Surface Morphology ◽  
Composite Coating ◽  
Electroless Deposition ◽  
Sample Surface ◽  
Reducing Agent ◽  
Experimental Results ◽  
Complexing Agent

In this paper, the method of electroless deposition of nickel-phosphorous composite coating on the sample surface is employed. The effect of the complexing agent ratio on the surface morphology and phase composition of nickel-phosphorus coating when the main salt and reducing agent concentration unchanged has been studied. The influence of heat treatment on properties and microstructure of coatings are also investigated. Experimental results show that in the case of salt and reducing agent concentration unchanged, complexing agent concentration has strong effect on the morphology of the coatings and the crystal structure of the composite coating. During heat treatment, the morphology of the composite coating changed significantly, and the hardness was improved a certain degree for all the samples, which is related to the precipitation of Ni3P.

Effect of Heat Treatment on Specific Surface Area of Si-C-O Fibers

2008 ◽  
Vol 368-372 ◽  
pp. 1639-1641
Author(s):  
Zeng Yong Chu ◽  
Rong An He ◽  
Hai Feng Cheng ◽  
Xiao Dong Li ◽  
Jun Wang
Keyword(s):  
Heat Treatment ◽  
Weight Loss ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Treatment Time ◽  
Porous Ceramic ◽  
Ceramic Fiber

In this paper, effect of heat treatment on the SSA of Si-C-O fibers was investigated and morphologies of the treated fibers were studied using SEM. The results revealed that weight loss was proportional to the treatment time at 1573K and the specific surface area (SSA) increased sharply when the weight loss reached above 6wt%. A rough and porous ceramic fiber with SSA of 23.76m2/g could be obtained at the weight loss of 9.1wt%, as a result of the treatment at 1573K for 32h.

scholarly journals The Development of a Mathematical Model for the Prediction of Corrosion Rate Behaviour for Mild Steel in 0.5 M Sulphuric Acid

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
I. Y. Suleiman ◽  
O. B. Oloche ◽  
S. A. Yaro
Keyword(s):  
Corrosion Rate ◽  
Mild Steel ◽  
Plant Extract ◽  
Acidic Medium ◽  
Sample Surface ◽  
Linear Regression Equation ◽  
Inhibitor Concentration ◽  
Influence Of Process Parameters ◽  
Rate Behaviour ◽  
Scanning Electron

The effect of varying temperature, concentration, and time on the corrosion rate of mild steel in 0.5 M H2SO4 acid with and without (wild jute tree) grewia venusta plant extract has been investigated by weight loss. The temperature, concentration of inhibitor and time were varied in the range of 0–10% v/v at 2% v/v interval, 30–70∘C at 20∘C interval, and 45–270 minutes at 45 minutes interval respectively. Scanning electron microscope was used to analyze the morphology of the sample surface. Linear regression equation and analysis of variance (ANOVA) were employed to investigate the influence of process parameters on the corrosion rate of the samples. The predicted corrosion rate of the samples was found to lie close to those experimentally observed ones. The confirmation of the experiment conducted using ANOVA to verify the optimal testing parameters shows that the increase in inhibitor concentration above 2% v/v and time would reduce the corrosion rate. The results also showed that the increase in temperature would also increase the corrosion rate greatly and that the plant extract was very effective for the corrosion inhibition of mild steel in acidic medium.

SEM-EDS Analysis of Composite Al2O3-ZrO2 Ceramics Eroded with SiC Particles

2015 ◽  
Vol 729 ◽  
pp. 27-31
Author(s):  
Kresimir Grilec ◽  
Lidija Curkovic ◽  
Marijana Majic Renjo ◽  
Suzana Jakovljevic ◽  
Matija Sakoman ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Surface Morphology ◽  
Tribological Properties ◽  
Slip Casting ◽  
Sample Surface ◽  
Impact Angle ◽  
Sem Analysis ◽  
Electric Kiln ◽  
Eds Analysis ◽  
Before And After

In this paper, composite Al2O3–t-ZrO2ceramics (composition: 95 wt. % Al2O3– 5 wt. % t-ZrO2and 90 wt. % Al2O3– 10 wt. % t-ZrO2) was formed by slip casting in plaster mould. After drying, green bodies were sintered in laboratory electric kiln under air environment at a temperature of 1650 °C.Erosive wear resistance of sintered monolithic Al2O3and composite Al2O3–t-ZrO2ceramics was determined by SEM analysis of the sample surface morphology before and after erosion at impact angle of 90° and SiC as erodent particles. Surface morphology analysis after erosion showed that wear scars were significantly larger on Al2O3than on Al2O3–t-ZrO2samples. All conducted tests showed that tribological properties of monolithic Al2O3can be improved with the addition of t-ZrO2.

scholarly journals Synthesis New Pyridinium Salts as Corrosion Inhibitors for Mild Steel in 1 M H2SO4

2021 ◽  
Vol 24 (2) ◽  
pp. 14-20
Author(s):  
Rania Kareem Hameed ◽  
◽  
Mehdi Salih Shihab ◽  
Keyword(s):  
Weight Loss ◽  
Free Energy ◽  
Corrosion Rate ◽  
Mild Steel ◽  
Corrosion Inhibitors ◽  
Organic Molecules ◽  
Inhibition Efficiency ◽  
Pyridinium Salts ◽  
Inhibitor Concentration ◽  
Pyridinium Bromide

Some new pyridinium salts, namely 4-(4-Chloro-benzylidene-hydrazinocarbonyl)-1-phenyl-pyridinium bromide, C1; 4-(4-Chloro-benzylidene-hydrazinocarbonyl)-1-butyl-pyridinium bromide, C2; 4-(4-Chloro-benzylidene-hydrazinocarbonyl)-1-phencyl-pyridinium bromide, C3; were synthesized and Corrosion inhibitors for mild steel were tested in a 1M H2SO4aqueous solution at 20ºC for 24 hours using weight loss measurements. The findings revealed that the inhibition efficiency of all pyridinium bromide derivatives converges at the maximum concentration. An increase in inhibitor concentration is associated with a decrease in corrosion rate, an increase in inhibition efficiencies, and an increase in surface degree of coverage. The physisorption effects for (C1, C2, and C3) were revealed by the free energy values of adsorption, which provided useful information for predicting the interaction between the metal surface and organic molecules as corrosion inhibitors.

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.

Developing Cathodic Protection Based on Disbondment Geometry

2012 ◽  
Author(s):  
Karina Chevil ◽  
Abdoulmajid Eslami ◽  
Weixing Chen ◽  
Reg Eadie ◽  
Richard Kania ◽  
...  
Keyword(s):  
Weight Loss ◽  
Corrosion Rate ◽  
Cathodic Protection ◽  
Mass Transfer Rate ◽  
Sem Analysis ◽  
Open Circuit ◽  
Film Deposition ◽  
General Corrosion ◽  
Protection Strategies ◽  
High Degree

Coating disbondment on pipelines is a common phenomenon that leads to exposure of the pipeline metal to ground water solutions, promoting a corrosive environment which is associated with stress corrosion cracking (SCC). This investigation tracks the corrosion behavior of X-65 steel at different coating disbondments at Open Circuit Potential (OCP) conditions through weight loss tests, as well as SEM analysis. For the weight loss test, X-65 coupons were placed into a vertical coupon holder with varying gap sizes between the coupons and the shielding (2 mm 5 mm, and 10 mm) simulating the coating disbondment. The results of the tests suggest that the corrosion rate inside the gap is dependent on the mass transfer rate of CO2. For larger gaps, the corrosion rate inside the gap decreases almost linearly with position (highest at the top of the disbondment) and is dependent on the iron carbonate film deposition. For smaller gaps (≤5 mm) a galvanic effect was observed between the coupons at the top of the disbondment (anodic) which showed a high degree of general corrosion, and the coupons at the bottom of the disbondment (cathodic) which had very low corrosion rates. The experimental observations were related to the corrosion scenarios found in the field. Cathodic protection strategies with respect to the geometry of disbondment are also discussed.

A Case Study on Inner Corrosion of 3%Cr Casing Steel in the CO2 Environments

2017 ◽  
Vol 872 ◽  
pp. 38-42
Author(s):  
Lin Xu ◽  
Si Yang Li ◽  
Ming Biao Xu
Keyword(s):  
Weight Loss ◽  
Corrosion Rate ◽  
Corrosion Product ◽  
Product Layer ◽  
Sem Analysis ◽  
Corrosion Property ◽  
Economic Exploitation ◽  
Corrosion Reaction ◽  
Corrosion Product Layer ◽  
Corrosion Behaviors

Understanding inner corrosion property of casing steel is fundamental to safe and economic exploitation of oil & gas. In this present work, a series of corrosion tests were conducted on 3%Cr coupons derived from 9-5/8” casing. Analyses of weight loss, product morphology and composition were carried out, to investigate the corrosion behaviors caused by sweet CO2. Analysis on the weight loss showed that, with an increment of temperature from 45°C to 105°C, the corrosion rate of 3%Cr coupon firstly ascends and then arrives to the maximum at 65°C. SEM analysis demonstrated the formation of a compact corrosion product layer on the specimen surface. While increasing the exposed time increases, the corrosion rate gradually descends. The main compositions of corrosion product are Fe-Cr and Cr5O12, which can effective hinder corrosion reaction in the CO2 environment.

A simple tactic synthesis of hollow porous graphitic carbon nitride with significantly enriched photocatalytic performance

2021 ◽  
Author(s):  
Vellaichamy Balakumar ◽  
Manivannan Ramalingam ◽  
Chitiphon Chuaicham ◽  
KARTHIKEYAN SEKAR ◽  
K. Sasaki
Keyword(s):  
Crystal Structure ◽  
Surface Area ◽  
Carbon Nitride ◽  
Photocatalytic Performance ◽  
Porous Graphitic Carbon ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Modified Surface

Hollow porous graphitic carbon nitride (porous CN) was synthesized via a simple tactic method, and the resulting porous CN showed an effectively modified surface area, crystal structure and enhanced photocatalytic...

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