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

PENGARUH BASIC SEDIMENT AND WATER TERHADAP LAJU KOROSI PIPA X52 DAN A53 PADA MEDIA OIL SLUDGE.

ROTOR ◽  
2017 ◽  
Vol 10 (1) ◽  
pp. 13
Author(s):  
Naufan Arviansyah ◽  
Sumarji Sumarji ◽  
Digdo Listyadi Setyawan
Keyword(s):  
Weight Loss ◽  
Carbon Steel ◽  
Corrosion Rate ◽  
Low Carbon Steel ◽  
Measuring Method ◽  
Oil Sludge ◽  
Uniform Corrosion ◽  
Low Carbon ◽  
Weight Loss Method ◽  
Loss Method

This research have a purpuse to know corrosion rate in pipe X52 and A53 at oil sludge media caused BS and W. Corrosion is a damage of metal that occurs because reaction between metal with environtment and produce unwanted of corrosion product. Pipe X52 and A53 is a type of low carbon steel that use for fluid transportation system in industry. Oil sludge is a sediment of crude oil from main gathering storage and containing variouses elements. Oil sludge have a one of element is Basic Sediment and Water that is can make corrosion happen to distribution pipes. Measuring Method used in this research is weight loss method. The result of corrosion rate in Oil Sludge media containing 30,17% BS and W for pipe A53 is 1,64 x 10-2 mmpy and the result for pipa X52 is 2,47 x 10-2 mmpy. The result of corrosion rate in Oil Sludge media containing 60,67% BS and W for pipe A53 is 2,12 x 10-2 mmpy and for pipe X52 the result is 3,13 x 10-2 mmpy. The result of this research showed pipe A53 have more resistance than pipe X52. The corrosion is classified as uniform corrosion. Keywords : A53, Weight Loss, Oil Sludge, X52.

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 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.

MUELLER ALLOY 7060

Alloy Digest ◽  
1985 ◽  
Vol 34 (10) ◽  
Keyword(s):  
Heat Exchangers ◽  
Cold Working ◽  
Elevated Temperatures ◽  
Salt Water ◽  
Iron Alloy ◽  
Heat Treating ◽  
Good Resistance ◽  
Nickel Iron ◽  
Water Heaters ◽  
Nickel Iron Alloy

Abstract MUELLER Alloy 7060 is a copper-nickel-iron alloy. It has good strength at moderately elevated temperatures and can be fabricated by both hot and cold-working procedures. It contains nominally 11/4 iron to increase its resistance to corrosion and erosion. It has good resistance to corrosion by salt water and is used in marine service. It is used widely for condenser tubes, distiller tubes, heat exchangers, evaporators and water heaters for domestic service. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-501. Producer or source: Mueller Brass Company.

COPPER ALLOY No. C70400

Alloy Digest ◽  
1985 ◽  
Vol 34 (9) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Velocity ◽  
Heat Exchangers ◽  
Copper Alloy ◽  
Cold Working ◽  
Elevated Temperatures ◽  
Salt Water ◽  
Heat Treating ◽  
Nickel Copper ◽  
Resistance To Stress

Abstract Copper Alloy No. C70400 is a 5.5% nickel-copper alloy characterized by resistance to corrosion by high-velocity seawater, resistance to stress-corrosion cracking, and retention of strength at moderately elevated temperatures. It responds well to both hot and cold-working operations. Among its many uses are springs, switches, heat exchangers, salt-water piping and relays. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Cu-500. Producer or source: Copper and copper alloy mills.

Nondestructive Measurement of In-Plane Residual Stress in Silicon Strips

1999 ◽  
Vol 591 ◽  
Author(s):  
Tieyu Zheng ◽  
Steven Danyluk
Keyword(s):  
Residual Stress ◽  
Residual Stresses ◽  
Large Deflection ◽  
Thin Plates ◽  
Nondestructive Measurement ◽  
Three Point Bending ◽  
Phase Stepping ◽  
Bending Load ◽  
Bending Loads ◽  
Processing Techniques

ABSTRACTThis paper reports the development of a shadow moiré technique to measure the in-plane residual stresses of thin, flat strips. This is an extension of prior work on the measurement of in-plane residual stresses in silicon plates and wafers. Phase stepping shadow moir6 and digital image processing techniques are employed to measure the deflections of the silicon plate specimens subjected to three-point-bending at several different loads. The measured deflections over the area of the silicon plates are fitted with an equation represented by a 2-D polynomial. With the theory of thin plates with large deflection, the fitting coefficients are used to extract the in-plane stresses at the different bending load. The residual stress is resolved by linear regression of the in-plane stresses versus bending loads.

Sinusoidal Torsional Buckling of Bars of Angle Section Under Bending Loads, as a Problem in Plate Theory

1951 ◽  
Vol 18 (3) ◽  
pp. 285-292
Author(s):  
H. J. Plass
Keyword(s):  
Infinite Series ◽  
Plate Theory ◽  
Ritz Method ◽  
Compressive Load ◽  
Series Solutions ◽  
Torsional Buckling ◽  
Bending Load ◽  
Angle Section ◽  
Bending Loads

Abstract Timoshenko has applied plate theory to each leg of an angle-section bar to determine the critical compressive load needed to cause sinusoidal torsional buckling. In this paper his idea is used to calculate the critical bending load needed to cause sinusoidal torsional buckling of an angle bar. The bending is assumed to be applied so that the extreme fibers of the angle are in compression, the vertex in tension. Approximate results are first obtained by means of the Rayleigh-Ritz method. The approximate deflection functions from which the energy terms are computed are based upon certain infinite-series solutions. After having obtained approximate results, exact values are obtained, using the approximate values as a guide to limit the amount of calculation. The results of this calculation are shown in Fig. 5, where they are compared with those predicted by bar theory. Differences between the two theories become more noticeable as the bar becomes short compared to its flange width. It is found that the critical bending load becomes larger very rapidly as the ratio of length to width of the flanges decreases. Bar theory predicts no such increase. The reason for this difference is explained.

Corrosion Behavior of Duplex Stainless Steel in Industrial White Liquor

CORROSION ◽  
10.5006/2558 ◽  
2017 ◽  
Vol 74 (5) ◽  
pp. 543-550 ◽  
Author(s):  
Luiza Esteves ◽  
Mônica M.A.M. Schvartzman ◽  
Wagner Reis da Costa Campos ◽  
Vanessa F.C. Lins
Keyword(s):  
Weight Loss ◽  
Stainless Steel ◽  
Corrosion Rate ◽  
Duplex Stainless Steel ◽  
Corrosion Behavior ◽  
Extrapolation Method ◽  
White Liquor ◽  
Duplex Steel ◽  
Kraft Mill ◽  
Lower Corrosion Rate

Specimens of lean duplex and duplex stainless steel were exposed at 200°C in industrial white liquor from a Brazilian kraft mill using an autoclave to simulate the same conditions of digester processing. Tafel extrapolation method and weight loss were used to evaluate corrosion behavior of duplex steel in white liquor. The higher alloy steel, although presenting a lower corrosion rate than the lean duplex, presents a more severe selective attack on ferrite, at 200°C and 1.8 MPa, after Tafel extrapolation method in industrial white liquor.

Coatings Formed on Steel by Cathodic Protection And Their Evaluation by Polarization Measurements

CORROSION ◽  
1963 ◽  
Vol 19 (2) ◽  
pp. 59t-68t ◽  
Author(s):  
W. J. SCHWERDTFEGER ◽  
RAUL J. MANUELE
Keyword(s):  
Weight Loss ◽  
Cathodic Protection ◽  
Protective Coatings ◽  
Salt Water ◽  
The Other ◽  
Carbon Anode ◽  
Zinc Anode ◽  
The Third ◽  
Corrosion Rates ◽  
City Water

Abstract Three steel specimens were continuously exposed in the laboratory for almost 5 years in city water to which was added 3 percent by weight of sodium chloride. Two of these specimens were under continuous cathodic protection, one by current from a zinc anode, and the other by current from a rectifier through a carbon anode. The third specimen was left to corrode freely. As a result of the cathodic protection, carbonates and silicates formed protective coatings which eventually reduced the current density required for protection from about 5 to 0.02 ma/sq ft. A coated specimen, after being without protective current for 32 days (including 12 days out of the salt water), required only 0.3 ma/sq ft for initial protection. The instantaneous corrosion rates on the coated specimens (scratched and unscratched) while without protective currents were measured by changes-in-slope (breaks) in polarization curves. The currents at which breaks occurred in the cathodic curves were found to be related to ΔV/ΔI values from the curves, which values in turn bore a relation to the corrosion rates as measured by weight loss.

Research on the Influence of Salt Fog Corrosion Behavior of 6005A Aluminum Alloy Welded Joints by Environment Humidity

2013 ◽  
Vol 662 ◽  
pp. 251-257
Author(s):  
Ning Xia ◽  
Zhi Min Zhu ◽  
Hui Chen
Keyword(s):  
Weight Loss ◽  
Tensile Strength ◽  
Aluminum Alloy ◽  
Aluminum Alloys ◽  
Relative Humidity ◽  
Corrosion Rate ◽  
Environmental Humidity ◽  
Welding Joints ◽  
Salt Fog Corrosion ◽  
Salt Fog

6005A aluminum alloys were welded at different relative humidity conditions. The effects of relative humidity on the salt fog corrosion of the welding joints were researched. The results showed that the weight loss of the joints after 14 days corrosion was higher than that corroded after 7days, but the corrosion rate was lower. The corrosion rate first increased then declined with the increase of environmental humidity for the joints corroded for 7days. However, when the environmental humidity was 80%, corrosion rate achieved the maximum, when environment humidity was 70%, corrosion rate was the lowest. After corroded for 14 days, corrosion rate was the maximum when the environmental humidity was 50%, and it was the lowest when the environmental humidity was 90%. The tensile strength declined obviously after corrosion.

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