Uniform Corrosion of Carbon Steel Boiler Feedwater Tubes

The acoustic emission (AE) technique was applied to monitor the pitting corrosion of carbon steel in NaHCO3 + NaCl solutions. The open circuit potential (OCP) measurement and corrosion morphology in-situ capturing using an optical microscope were conducted during AE monitoring. The corrosion micromorphology was characterized with a scanning electron microscope (SEM). The propagation behavior and AE features of natural pitting on carbon steel were investigated. After completion of the signal processing, including pre-treatment, shape preserving interpolation, and denoising, for raw AE waveforms, three types of AE signals were classified in the correlation diagrams of the new waveform parameters. Finally, a 2D pattern recognition method was established to calculate the similarity of different continuous AE graphics, which is quite effective to distinguish the localized corrosion from uniform corrosion.

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Hazard Evaluation of Carbon Steel Water Tube Boiler under Explosion Behavior

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1006-1007.200 ◽

2014 ◽

Vol 1006-1007 ◽

pp. 200-203

Author(s):

Hao Yang Du ◽

Yong Zhao ◽

Zhen An Ren

Keyword(s):

Carbon Steel ◽

Hazard Evaluation ◽

Water Tube ◽

Tnt Equivalent ◽

Operation Pressure ◽

Equivalent Method ◽

Steel Boiler

Physical explosion model is applied in a certain carbon steel vertical water tube boiler explosion analysis, all the safety accessories and records have been damaged and no data related with before explosion could be found. Boiler energy and operation pressure before explosion was estimated by the measurement of cast pieces. Hurt radius calculated by TNT equivalent method is in accordance with on site measuring, which proves that TNT equivalent method is applicable in carbon steel boiler explosion analysis.

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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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Specification for Seamless Medium-Carbon Steel Boiler and Superheater Tubes

10.1520/a0210_a0210m-02r07 ◽

2007 ◽

Author(s):

Keyword(s):

Carbon Steel ◽

Medium Carbon Steel ◽

Medium Carbon ◽

Steel Boiler

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Corrosion Behavior of Carbon Steel and Stainless Steel Materials under Salt Deposits in Simulated Dry Repository Environments

MRS Proceedings ◽

10.1557/proc-757-ii4.14 ◽

2002 ◽

Vol 757 ◽

Cited By ~ 2

Author(s):

Lietai Yang ◽

Roberto T. Pabalan ◽

Lauren Browning ◽

Darrell S. Dunn

Keyword(s):

Stainless Steel ◽

Carbon Steel ◽

Relative Humidity ◽

Multielectrode Array ◽

Chloride Salt ◽

Uniform Corrosion ◽

Salt Deposit ◽

Steel Material ◽

Deliquescence Relative Humidity

ABSTRACTIn-situ coupled multielectrode array sensors were used to measure the non-uniform corrosion of carbon steel and stainless steel materials under KCl salt deposit in simulated dry repository environments. It was found that the initiation of non-uniform corrosion occurs at a relative humidity that is 14% lower than the deliquescence relative humidity of the chloride salt. It was found also that once significant corrosion had occurred, the non-uniform corrosion process for the carbon steel material under the salt deposit continues at relative humidities as low as 27%.

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Open Site Tests on Corrosion of Carbon Steel:Containers for Radioactive Waste Forms

MRS Proceedings ◽

10.1557/proc-556-903 ◽

1999 ◽

Vol 556 ◽

Author(s):

A. S. Barlnov ◽

M. I. Ojovan ◽

N. V. Ojovan ◽

I. V. Startceva ◽

G. N. Chujkova

Keyword(s):

Carbon Steel ◽

Radioactive Waste ◽

Open Field ◽

Wall Thickness ◽

Climatic Factors ◽

Corrosion Behaviour ◽

Field Conditions ◽

Component Part ◽

Uniform Corrosion ◽

Waste Forms

AbstractTesting of waste containers under open field conditions is a component part of the research program that is being carried out at SIA “Radon”for more than 20 years to understand the long-term behaviour of radioactive waste forms and waste packages. This paper presents the preliminary results of these ongoing studies. We used a typical NPP operational waste, containing 137Cs, 134Cs, and 60Co as the dominant radioactive constituents. Bituminized and vitrified waste samples with 30–50 wt.% waste loading were prepared. Combined effects of climatic factors on corrosion behaviour of carbon steel containers were estimated using gravimetric and chemical analyses. The observations suggest that uniform corrosion of containers prevails under open field conditions. The upper limits for the lifetime of containers were derived from calculations based on the model of atmospheric steel corrosion. Estimated lifetime values range from 300 to 600 years for carbon steel containers with the wall thickness of 2 mm containing vitrified waste, and from 450 to 500 years for containers with the wall thickness of 2.5 mm that were used for bituminized waste. However, following the most conservative method, pitting corrosion may cause container integrity failure after 60 to 90 years of exposure.

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