Pressurized Water Corrosion Resistance of Carbon Steels and Their Nondestructive Characterization

2007 ◽  
Vol 353-358 ◽  
pp. 2407-2410
Author(s):  
Sang Ll Lee ◽  
Jin Kyung Lee ◽  
Tae Soo An ◽  
Joon Hyun Lee ◽  
Jun Young Park
Keyword(s):  
Tensile Strength ◽  
Corrosion Resistance ◽  
Carbon Steel ◽  
Test Specimen ◽  
Corrosion Test ◽  
Water Pressure ◽  
Carbon Steels ◽  
Pressurized Water ◽  
Damage Degree ◽  
Nondestructive Characterization

This study dealt with the corrosion resistance for the carbon steels under a pressurized water atmosphere at the elevated temperature. The nondestructive test was also used to evaluate the damage degree of corrosion test specimen. The corrosion test for carbon steels was carried out at the temperature of 200 °C under a water pressure of 10 MPa. The corrosion time for carbon steel was changed up to 20 weeks. The strength of carbon steel by the degree of corrosion was investigated by a tensile test. The carbon steel showed an average tensile strength of about 500 MPa after the corrosion period of 20 weeks, accompanying the weight loss of about 2.5 %. The attenuation coefficient of ultrasonic wave can be utilized as useful parameters to inspect the corrosion damages of carbon steels.

Corrosion Resistance and Mechanical Properties of Carbon Steel under a High Temperature Pressurized Water

2007 ◽  
Vol 345-346 ◽  
pp. 1027-1030
Author(s):  
Sang Ll Lee ◽  
Moon Hee Lee ◽  
Jin Kyung Lee ◽  
Dong Su Bae ◽  
Joon Hyun Lee
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Carbon Steel ◽  
Corrosion Test ◽  
Water Pressure ◽  
Strength Properties ◽  
Carbon Steels ◽  
Pressurized Water ◽  
Corrosion Strength

The long-term corrosion strength properties for the carbon steels under pressurized water atmosphere have been investigated, in the conjunction with the detailed analysis of their microstructures. The corrosion test for carbon steels was carried out at the temperature of 200°C under a water pressure of 10 MPa. The corrosion test samples were maintained up to 50 weeks in the tube shaped reactor. The mechanical strength and the microstucture of carbon steels suffered from the long term corrosion test were evaluated by SEM, XRD and tensile test. The weight loss of carbon steel by the corrosion test was also examined. The tensile strength of carbon steels decreased with the increase of corrosion time under a pressurized water atmosphere, accompanying the creation of severe corrosion damages like stress corrosion crack.

High Temperature Corrosion Behaviors of Carbon Steels by A Pressurized Water

2007 ◽  
Vol 26-28 ◽  
pp. 1063-1066
Author(s):  
Sang Ll Lee ◽  
Moon Hee Lee ◽  
Jin Kyung Lee ◽  
Joon Hyun Lee ◽  
Yu Sik Kong
Keyword(s):  
High Temperature ◽  
Ultrasonic Wave ◽  
Corrosion Test ◽  
Water Pressure ◽  
Test Sample ◽  
Carbon Steels ◽  
Acoustic Emission Sensor ◽  
Pressurized Water ◽  
Corrosion Behaviors

The long-term corrosion resistances for the carbon steels have been investigated under high temperature pressurized water atmosphere, in the conjunction with the analysis of nondestructive properties by the ultrasonic wave. The corrosion test for carbon steels was carried out at the temperature of 200 °C under a water pressure of 10 MPa. The corrosion test cycles for carbon steels were changed up to 65 weeks. The mechanical properties of carbon steel suffered from the corrosion cycle were investigated by a tensile test, attaching an acoustic emission sensor on the test sample. The tensile strength of carbon steels greatly decreased beyond the corrosion cycle of 35 weeks, accompanying the increase of weight loss by the creation of corrosion damages. The attenuation coefficient of carbon steels by the ultrasonic wave increased with the increase of corrosion cycles.

UNIFLUX 70

Alloy Digest ◽  
1978 ◽  
Vol 27 (9) ◽  
Keyword(s):  
Carbon Dioxide ◽  
Fracture Toughness ◽  
Tensile Strength ◽  
Corrosion Resistance ◽  
Carbon Steel ◽  
Physical Properties ◽  
Heat Treating ◽  
Shielding Gas ◽  
Electrode Wire ◽  
Welding Electrode

Abstract UNIFLUX 70 is a continuous flux-cored welding electrode (wire) for welding in carbon dioxide shielding gas in the flat groove and horizontal fillet positions. It is used widely in shipbuilding and other fabricating industries to weld carbon steel and provides around 82,000 psi tensile strength and around 50 foot-pounds Charpy V-notch impact at 0 F. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as heat treating, machining, and joining. Filing Code: CS-74. Producer or source: Unicore Inc., United Nuclear Corporation.

Investigation of Duplex Stainless Steels for Pipeline Repairs

2004 ◽  
Author(s):  
Dave Fetzner ◽  
Nate Ames ◽  
Greg Ruschau
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Carbon Steel ◽  
Duplex Stainless Steel ◽  
Carbon Steels ◽  
Pipeline System ◽  
General Corrosion ◽  
Potential Candidate ◽  
Elevation Changes ◽  
Reducing Costs

Hundreds of miles of production pipelines make up the network at the Prudhoe Bay oilfield in Northern Alaska, part of the vast petroleum reserves which feed one million barrels of crude oil per day to the 800-mile Trans Alaska Pipeline System. Part of the inevitable layout on a land-based pipeline of this size is the need to cross roads and undergo similar directional changes. When the pipeline was constructed this hurdle was overcome by burying the pipe for short sections. At present the system has hundreds of buried road crossings. One of the continued high-cost maintenance issues with the pipeline is the corrosion that occurs at the elbows used for direction and elevation changes. The pipelines are constructed primarily out of high tensile strength carbon steels. While carbon steel is sufficient for most of the pipeline, the elbows present new challenges such as the cumulative effects of erosion and pitting corrosion. One proposed solution was to replace the carbon steel with duplex stainless steel in these areas of higher susceptibility. Duplex stainless steel has a high general corrosion resistance and better velocity-assisted corrosion resistance than carbon steel. Coupled with its recent decrease in cost, this solution makes the use of duplex stainless steel a potential candidate for the above application, reducing costs of the repair and inspection for the entire pipeline. Technical issues which are significant in joining carbon steel to duplex stainless steel include the proper selection of the weld metal alloy, weld cooling rates, and corrosion of the carbon steel due to the joining of dissimilar alloys. This paper addresses these issues of welding and corrosion that were investigated for the use of duplex pipe and components in the carbon steel system.

scholarly journals An Effect of Electric Current Variations and Wire Feed Rate on Low Carbon Steels Toward Tensile Strength on The Result of Gas Metal Arc Welding

2018 ◽  
Vol 204 ◽  
pp. 06010
Author(s):  
Taufik Hardiansyah ◽  
Moch Rofi Imron ◽  
Johan Handoko ◽  
Solichin ◽  
Abdul Qolik
Keyword(s):  
Tensile Strength ◽  
Carbon Steel ◽  
Electric Current ◽  
Feed Rate ◽  
Gas Metal Arc Welding ◽  
Carbon Steels ◽  
Low Carbon ◽  
Metal Arc Welding ◽  
Current Variation ◽  
Wire Feed

The purpose of this study was to find out the tensile strength of GMAW welded carbon steel with electric current variation and wire feed rate. The research method used was experimental research with electric current variation of 120 A, 140 A, and 160 A and variation of wire feed rate 4 m/min and 5 m/min. The tensile strength test of sample was done by ASTM E8 / E8M-09 test standard. The result showed that the electric current variation and wire feed rate in welding of carbon steel with GMAW welding gave effect on the value of tensile strength which was varied. The electric current of 120 A and the wire feed rate of 4 m/min obtained the highest tensile strength of 52.67 kgf/mm2 and welding with electric current of 120 A and wire feed rate of 5 m/min obtained the lowest tensile strength of 48.33 kgf/mm2.

scholarly journals Burnishing Operation for Corrosion Resistance Improvement of AISI 1017 Carbon Steel

2018 ◽  
Vol 3 (6) ◽  
pp. 21
Author(s):  
Zeyad D. Kadhim ◽  
Mohammed Abdulraoof Abdulrazzaq ◽  
Suha Qays AL-Shahrabalee
Keyword(s):  
Plastic Deformation ◽  
Corrosion Resistance ◽  
Carbon Steel ◽  
Corrosion Test ◽  
Low Carbon Steel ◽  
Ground Surface ◽  
Low Carbon ◽  
Variable Speed ◽  
Below Ground ◽  
Resistance Improvement

This research deal with investigation the influence of burnishing operation on the corrosion resistance of low carbon steel. The burnishing operation involve pressing a hard roller made from stainless steel on the surface of the rotatory shaft, this operation leads to the formation of a plastic deformation on the surface of the steel. Burnishing feed and burnishing speed were the variables which are used for this study. The first group involve hold burnishing speed on 125rpm with variable feeds of 0.6, 0.9, 1.5, 2 and 3mm/rev and the second group involve hold burnishing feed on 2 mm/rev with variable speed of 85, 125, 370, 800 and 1200rpm. The corrosion test was done via applying potentiostat at 23ºC in sample of water from Tigress River at upstream Samara’a barrage and groundwater (Yousifia salt well 90m below ground surface). The result showed that there was improvement in corrosion resistance of the steel were the corrosion rate reduced from 7.577 mpy to 0.685 mpy in sample of water from Tigress River and from 8.878 mpy to 1.38 mpy sample of water from groundwater.

The Increasing of Corrosion Resistance of Low Alloy Carbon Steels Used in Petroleum Industry through Coating with Alloys Based on Fe-Ni-Cr by Thermal Spray

2014 ◽  
Vol 1029 ◽  
pp. 158-163 ◽  
Author(s):  
Stefan Lucian Toma ◽  
Margareta Peneoasu ◽  
Costică Bejinariu ◽  
Diana Antonia Gheorghiu ◽  
Lucian Eva ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Corrosion Resistance ◽  
Carbon Steel ◽  
Petroleum Industry ◽  
Thermal Spraying ◽  
Sem Analysis ◽  
Carbon Steels ◽  
Properties Of Coatings ◽  
Scanning Electron

The main objective of this paper is to evaluate the mechanical properties, chemical and corrosion resistance of four types of metallic coatings: FeCr, FeCoCr, and FeCoCrNi, FeCrNi sprayed through thermal spraying in electric arc on an anchor substrate type 95Ni5Al or 78.3Ni20Cr1. 4Si0.3Fe. The five layers tested were deposited on carbon steel support low alloyed and the obtained results have provided a picture regarding the possibilities of using of the deposits. Because these types of alloys are used to increase the wear resistance of tools, it is very important to know their behaviour is saline environment, because the contributions brought by this paper would increase the applicability domain of these materials (could be used to recondition by thermal spraying the tools used in naval and petroleum industry). The researches of the obtained deposits have been carried out through several methods to screen their performance. Therefore, there have been done investigations on the microstructural morphology of the deposit, by optical microscopy (OM) and scanning electron microscopy (SEM). The OM and SEM results have sought to determine the degree of uniformity of the deposits and the amount of pores and oxides in layer. The physical properties of coatings were also evaluated by adhesion and porosity quantification. The corrosion resistance was evaluated by exposing samples in saline fog chamber. The corrosion products formed on the surface layers were investigated by scanning electron microscopy (SEM) analysis of the SEM. The intermediate alloy 78.3Ni20Cr1.4Si0.3Fe used as anchoring layer allowed the reducing of the pores and micro cracks frequently found in the ordinary 95Ni5Al alloy. It has been observed that the deposits based on NiCrCo are good enough to be used as an efficient coating of carbon steel in aggressive marine environments.

Chromium Nitrided A283-C Steel as Bipolar Plate for PEMFC

2011 ◽  
Vol 197-198 ◽  
pp. 753-756 ◽  
Author(s):  
Chang Yong Choi ◽  
Dae Geun Nam
Keyword(s):  
Corrosion Resistance ◽  
Carbon Steel ◽  
Corrosion Test ◽  
Low Carbon Steel ◽  
Bipolar Plate ◽  
Low Carbon ◽  
Good Corrosion Resistance ◽  
Interfacial Contact ◽  
Surface Modified ◽  
Interfacial Contact Resistance

Bipolar plate of stack in polymer electrolyte membrane fuel cell (PEMFC) has high cost and heavy weight. In this study, low carbon steel was used as a base metal of bipolar plate for the lower cost than stainless steels, which are widely researched as bipolar plate. Low carbon steel has not a good corrosion resistance. In order to improve the corrosion resistance and electrolytic conductivity, low carbon Steel needs to be surface modified. We made chromium electroplated layer of 5㎛ and 10㎛ thickness on the surface of low carbon steel, and it was thermally nitrided for 3hours at 1173K in a furnace with 50torr nitrogen gas pressure. Cross-section and surface microstructures of surface treated low carbon steel were investigated using OM and SEM. Also crystal structures are observed by XRD. Interfacial contact resistance and corrosion test were considered to simulate the internal operating conditions of PEMFC stack. The corrosion test was performed in 0.1N H2SO4 + 2ppm F- solution at 80°C. The results show that the surface modified steel plates have good corrosion resistance and relatively low interfacial contact resistance, and it should be candidate material as a bipolar plate of PEMFC.

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