Corrosion Behavior for Casing in Producing Well with Water Injection Technology during Long-Term Service

Corrosion leakage became serious due to cyclic sewage injection and continuous increase in water injection pressure. Corrosion behavior for N80 casing was studied during long-term service, using corrosion reaction kettle and weight loss method. The morphology and composition were characterized with laser confocal microscopy (LCM), scan electron microscopy (SEM) and energy disperse spectroscopy (EDS). These results showed that corrosion rate remained constantly at initial stage, and increased gradually, then sharply reached to 0.327mm/a at later stage, accompanying with inflection point under oxygen condition. Meanwhile, corrosion rate decreased significantly from 0.028mm/a to 0.020mm/a under oxygen-free condition. The corrosion of N80 steel was dominated by dissolved oxygen, and accelerated by chloridion. The micro-mechanism was suggested to be the transition of defect structure from crack with micron range to etch pit with millimeter range.

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Corrosion Behavior of a Nickel-Base Dental Casting Alloy in Artificial Saliva Studied by Weight Loss and Polarization Techniques

Frontiers in Dentistry ◽

10.18502/fid.v16i1.1104 ◽

2019 ◽

Author(s):

Elnaz Moslehifard ◽

Mahsa Moslehifard ◽

Sanaz Ghasemzadeh ◽

Farzad Nasirpouri

Keyword(s):

Weight Loss ◽

Corrosion Rate ◽

Corrosion Behavior ◽

Base Alloy ◽

Artificial Saliva ◽

Ph Values ◽

Significant Difference ◽

Weight Loss Method ◽

Loss Method ◽

Nickel Base

Objectives: Nickel-chromium (Ni-Cr) base dental alloys with desirable properties have been employed in prosthodontics for years. Corrosion behavior of a Ni-Cr base alloy in artificial saliva with different pH values is determined in this work. Materials and Methods: Corrosion behavior of Ni-Cr alloy was studied using weight loss described by corrosion rate (CR) in mils per year (mpy) and potentiodynamic polarization described by corrosion potential (CP) in mV and current density (CD) in mA/cm2 in artificial saliva with different pH. Surface morphology was studied using scanning electron microscopy (SEM). Statistical difference was assessed using one-way ANOVA and post-hoc Tukey's honestly significant difference (HSD) test with a difference significance of 95%. Results: In weight loss method, CR was 71.95±3.40, 17.26±1.03, 8.92±0.35, and 6.93±0.54 mpy at pH values of 2.5, 5, 7, and 9, respectively. CR obtained at pH of 2.5 was significantly different than that in other groups, but those obtained at pH of 5, 7, and 9 were not significantly different. In the polarization method, CP values were significantly different. CD measured at pH of 2.5 and 5 was significantly different than the rest of pH values (P<0.05). CRs at pH of 7 and 9 were not significantly different. SEM exhibited the formation of preferential sites of corrosion attacks influenced by pH. Conclusions: Both techniques revealed consistent results. Corrosion resistance increases as pH increases towards less acidic conditions. In more acidic saliva, the corrosion rate is greater. The less acidic saliva leads to formation of a more stable passive film on Ni, and the dissolution of Ni decreases, leading to lower CRs.

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Effects of Surfactant on Corrosion Behavior of Carbon Steel in Simulated Crude Oil

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1115.223 ◽

2015 ◽

Vol 1115 ◽

pp. 223-225

Author(s):

Mohammad Zakaria ◽

Suryanto ◽

Irfan Hilmy

Keyword(s):

Carbon Steel ◽

Corrosion Rate ◽

Crude Oil ◽

Enhanced Oil Recovery ◽

Corrosion Behavior ◽

Oil Recovery ◽

Oil And Gas ◽

Uniform Corrosion ◽

Weight Loss Method ◽

Loss Method

Enhanced Oil Recovery (EOR) is a technique used in oil and gas industries to increase the amount of crude oil production by injection of brine, a mixture of surfactant, water and seawater. As the results, crude oil contains brine which is corrosive. Surfactant is used to lessen the corrosion effect in addition to increase flowing of oil. In this study, the effect of surfactant on corrosion behavior of carbon steel in simulated enhanced oil recovery crude was investigated. Autoclave machine was used to perform corrosion experiment in the oxygen free environments. Corrosion rate was measure using weight loss method. The results show that surfactant reduces corrosion rate of carbon steel from 0.061 mm/y to 0.042 mm/y and the corrosion type on carbon steel was uniform corrosion.

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The Influence of Different Gas Welding Flame on Corrosion Behavior of the Carbon Steel’s Heat Affected Zone in Seawater

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1120-1121.1059 ◽

2015 ◽

Vol 1120-1121 ◽

pp. 1059-1063

Author(s):

Cai Xiang Gu ◽

Guang Wei Liu ◽

Yu Dong Xu

Keyword(s):

Corrosion Rate ◽

Base Metal ◽

Corrosion Behavior ◽

Heat Affected Zone ◽

Corrosion Potential ◽

Corrosion Current ◽

Electroanalytical Chemistry ◽

Microstructure Observation ◽

Weight Loss Method ◽

Loss Method

The influence of different flame of gas welding on corrosion behavior of the carbon steel’s heat affected zone in seawater were studied by the weight-loss method, electroanalytical chemistry method and surface and microstructure observation. The result indicate that when gas welding the carbon steel, the corrosion rate of the heat affected zone under the influence of mild carbonizing flame is 0.1252[g／(m2•h)], in contrast, the corrosion rate of that under the influence of neutral flame is 0.1025[g／(m2•h)]; the order of corrosion current shows as follows: Imild carbonizing flame>Ineutral flame>Ibase metal; the order of measured corrosion potential as follows: Ebase metal>Eneutral flame>Emild carbonizing flame. Compared with the base metal, the heat effected zone are more likely to corrosion, corrosion resistance of the sample under mild carbon flame are the worse.

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Dissolution of chromium in sulfuric acid

Journal of the Serbian Chemical Society ◽

10.2298/jsc0211777d ◽

2002 ◽

Vol 67 (11) ◽

pp. 777-782 ◽

Cited By ~ 8

Author(s):

Dragutin Drazic ◽

Jovan Popic

Keyword(s):

Corrosion Rate ◽

Room Temperature ◽

Corrosion Potential ◽

Analytical Data ◽

Electrochemical Corrosion ◽

Spectrophotometric Analysis ◽

Weight Loss Method ◽

Loss Method ◽

Anomalous Dissolution

By combining electrochemical corrosion rate measurements and spectrophotometric analysis of the electrolyte it was shown that at room temperature chromium dissolves in deaerated 0.1M Na2SO4 + H2SO4 (pH1) solution as Cr(II) and Cr(III) ions in he ratio Cr(II):Cr(III)?7:1. This process was stable over 4h without any detectable change. The total corrosion rate of chromium calculated from the analytical data is about 12 times higher, than that determined electrochemically by cathodic Tafel line extrapolation to the corrosion potential. This finding was confirmed by applying the weight-loss method for the determination of the corrosion rate. This enormous difference between these experimentally determined corrosion rates can be explained by the rather fast, "anomalous" dissolution process proposed by Kolotyrkin and coworkers (chemical reaction of Cr with H2O molecules) occurring simultaneously with the electrochemical corrosion process.

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Corrosion Behavior of Copper and Carbon Steel in Acidic Media

Baghdad Science Journal ◽

10.21123/bsj.11.4.1577-1582 ◽

2014 ◽

Vol 11 (4) ◽

pp. 1577-1582

Author(s):

Baghdad Science Journal

Keyword(s):

Carbon Steel ◽

Hydrochloric Acid ◽

Sulphuric Acid ◽

Corrosion Behavior ◽

Effect Of Temperature ◽

Acidic Media ◽

Corrosion Rates ◽

Weight Loss Method ◽

Acid Environment ◽

Loss Method

The corrosion behavior of copper and carbon steel in 1M concentration of hydrochloric acid (HCl) and sulphuric acid (H2SO4) has been studied. The corrosion inhibition of copper and carbon steel in 1M concentration of hydrochloric acid (HCl) and sulphuric acid (H2SO4) by Ciprofloxacin has been investigated. Specimens were exposed in the acidic media for 7 hours and corrosion rates evaluated by using the weight loss method. The effect of temperature (from 283 ºK to 333 ºK), pH (from 1to 6), inhibitor concentration (10-4 to 10-2) has been studied. It was observed that sulphuric acid environment was most corrosive to the metals because of its oxidizing nature, followed by hydrochloric acid. The rate of metal dissolution increased with increasing exposure time. Corrosion rates of carbon steel in the acidic media found to be higher.

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Corrosion Behaviour of Aluminium Alloy in Palm Oil Methyl Ester (B100)

Jurnal Teknologi ◽

10.11113/jt.v58.1552 ◽

2012 ◽

Vol 58 (2) ◽

Author(s):

W. B. Wan Nik ◽

S. Syahrullail ◽

R. Rosliza ◽

M. M. Rahman ◽

M. F. R. Zulkifli

Keyword(s):

Weight Loss ◽

Methyl Ester ◽

Corrosion Rate ◽

Aluminium Alloy ◽

Palm Oil ◽

Corrosion Behaviour ◽

Corrosion Current ◽

Electrochemical Test ◽

Weight Loss Method ◽

Loss Method

The aim of this study is to determine the corrosion effect of palm oil methyl ester (POME) on aluminium alloy 5083 (AA5083). The static immersion test was carried out at 60°C for 68 days according to ASTM G–31–72. The corrosion analysis was done by using weight loss method and electrochemical test. The result from weight loss method shows the decreasing in weight loss of AA5083 which signifies the ability of POME to reduce corrosion rate. The electrochemical test shows the decreasing in polarization resistance,Rp, while the corrosion current densities, Icorr, increase. The corrosion rate reduces from 2.250mpy to 0.1946mpy. The low concentration of fatty acid C18:2 and high anti oxidant element contributes to the reduction of corrosion rate of AA5083 in POME.

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Inhibition of Aloe in Corrosion Experimental Research

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.233-235.648 ◽

2011 ◽

Vol 233-235 ◽

pp. 648-651

Author(s):

Ai Jun Wei ◽

Bei Feng ◽

Xin Zhang ◽

Fu Yong Huo

Keyword(s):

Weight Loss ◽

Corrosion Rate ◽

Work Environment ◽

Corrosion Inhibition ◽

Corrosion Test ◽

Inhibition Effect ◽

Corrosion Medium ◽

Different Temperatures ◽

Weight Loss Method ◽

Loss Method

In this corrosion test, simulated brine is used as corrosion medium, added different concentrations of aloe juice. Static weight-loss method is employed, meanwhile, we calculated corrosion rate of Q235 steel and researched on the corrosion inhibition effect of aloe in different temperatures. Results show that aloe is a good inhibitor, rate of corrosion inhibition can reach 80% or more and suitable for the temperature of work environment is less than 60 °C.

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Microbial Corrosion of API 5L X-70 Carbon Steel by ATCC 7757 and Consortium of Sulfate-Reducing Bacteria

Journal of Chemistry ◽

10.1155/2014/130345 ◽

2014 ◽

Vol 2014 ◽

pp. 1-7 ◽

Cited By ~ 11

Author(s):

Arman Abdullah ◽

Nordin Yahaya ◽

Norhazilan Md Noor ◽

Rosilawati Mohd Rasol

Keyword(s):

Weight Loss ◽

Carbon Steel ◽

Corrosion Rate ◽

Sulfate Reducing Bacteria ◽

Desulfovibrio Vulgaris ◽

Corrosion Morphology ◽

Sulfate Reducing ◽

Weight Loss Method ◽

Loss Method ◽

Reducing Bacteria

Various cases of accidents involving microbiology influenced corrosion (MIC) were reported by the oil and gas industry. Sulfate reducing bacteria (SRB) have always been linked to MIC mechanisms as one of the major causes of localized corrosion problems. In this study, SRB colonies were isolated from the soil in suspected areas near the natural gas transmission pipeline in Malaysia. The effects of ATCC 7757 and consortium of isolated SRB upon corrosion on API 5L X-70 carbon steel coupon were investigated using a weight loss method, an open circuit potential method (OCP), and a potentiodynamic polarization curves method in anaerobic conditions. Scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS) were then used to determine the corrosion morphology in verifying the SRB activity and corrosion products formation. Results from the study show that the corrosion rate (CR) of weight loss method for the isolated SRB is recorded as 0.2017 mm/yr compared to 0.2530 mm/yr for ATCC 7757. The Tafel plot recorded the corrosion rate of 0.3290 mm/yr for Sg. Ular SRB and 0.2500 mm/yr forDesulfovibrio vulgaris. The results showed that the consortia of isolated SRB were of comparable effects and features with the single ATCC 7757 strain.

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

ROTOR ◽

10.19184/rotor.v10i1.5141 ◽

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.

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