Three years outdoor exposure of low carbon steel in Mauritius

2015 ◽  
Vol 62 (4) ◽  
pp. 246-252 ◽  
Author(s):  
Baboo Y. R. Surnam
Keyword(s):  
Carbon Steel ◽  
Atmospheric Corrosion ◽  
Corrosion Behaviour ◽  
Low Carbon Steel ◽  
Exposure Period ◽  
Outdoor Exposure ◽  
Low Carbon ◽  
Steel Buildings ◽  
Content Type ◽  
Time Of Wetness

Purpose – This paper aims to investigate the corrosion behaviour of carbon steel in the Mauritian atmosphere over a three-year period. Atmospheric corrosion is a serious problem in Mauritius. Design/methodology/approach – Carbon steel samples were exposed outdoors at various sites. Mass loss analysis was performed to determine the corrosion behaviour of the metal over the exposure period. Scanning electron microscopy and Raman tests were performed to investigate the formation of the corrosion products on the carbon steel surface. Findings – It was found that the corrosion loss at two of the sites considered did not vary clearly according to the bilogarithmic law. Time of wetness was found to be a main factor affecting atmospheric corrosion in Mauritius. The corrosivity of the atmosphere was found to lie between categories C3 and C4, according to ISO 9223. Originality/value – The results can be of essential help to the construction industry, especially as steel buildings are becoming very common in Mauritius. Moreover, as Mauritius is a tropical island, the results obtained can be useful in other tropical islands.

scholarly journals Corrosion rate and corrosion behaviour analysis of carbon steel pipe at constant condensed fluid

10.30544/591 ◽  
2021 ◽  
Author(s):  
Ahmad Royani ◽  
Siska Prifiharni ◽  
Gadang Priyotomo ◽  
Sundjono Sundjono
Keyword(s):  
Carbon Steel ◽  
Corrosion Rate ◽  
Corrosion Behaviour ◽  
Low Carbon Steel ◽  
Exposure Period ◽  
Xrd Analysis ◽  
Quality Parameters ◽  
Corrosion Products ◽  
Steel Pipe ◽  
Low Carbon

This study investigates the corrosion rate and corrosion behavior of carbon steel pipe at constant condensed fluid from a geothermal power plant. The corrosion rate of the steel was determined by weight loss analysis, whereas the corrosivity of the condensate fluids was measured by a multimeter Hach HQ40d. The morphology of the corrosion products formed was characterized by scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), and x-ray diffraction (XRD) analysis. Results showed that the corrosion rate in the liquid part of the condensate fluids is constant during the immersion period when water quality parameters are constant. Meanwhile, the corrosion rate of low carbon steel pipe decreases though with the longer exposure period in the condensate fluid. The decrease of metal corrodibility identical to the lower corrosion rate at a longer exposure time due to the protective corrosion layer formed. The corrosion products during immersion tests identified in the corrosion test were uniform with iron oxide in the form of FeO(OH) and Fe2O3*H2O.

The transformation of corrosion products on 0Cu2Cr carbon steel in the marine

2021 ◽  
Vol 68 (5) ◽  
pp. 457-463
Author(s):  
Hongyu Liu ◽  
Yingxue Teng ◽  
Jing Guo ◽  
Qinghe Xiao ◽  
Miao Wang ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Energy Dispersive Spectrometer ◽  
Low Carbon Steel ◽  
Transformation Process ◽  
Corrosion Products ◽  
Low Carbon ◽  
X Ray Diffraction ◽  
Transformation Mechanism ◽  
Content Type ◽  
Marine Engineering

Purpose This paper aims to explore the transformation process and transformation mechanism of carbon steel under the marine environment. Design/methodology/approach In this paper, the transformation and rust layers corrosion products on 0Cu2Cr carbon steel with different cycles coupon test was investigated and deeply explored by scanning electron microscope, energy dispersive spectrometer, X-ray diffraction. Findings The results showed that the thickness of rust layers grew from 71.83 µm to 533.7 µm with increasing duration of corrosion. The initial corrosion product was γ-FeOOH, then part of the γ-FeOOH continued growing, and under the capillary action, the other part of the γ-FeOOH transformed to α-FeOOH. Originality/value To the best of the authors’ knowledge, this paper puts forward for the first time a new viewpoint of the development of corrosion products of low-carbon steel in two ways. This discovery provides a new idea for the future development of steel for marine engineering.

scholarly journals Analysis of Short-Term Steel Corrosion Products Formed in Tropical Marine Environments of Panama

2012 ◽  
Vol 2012 ◽  
pp. 1-11 ◽  
Author(s):  
Juan A. Jaén ◽  
Josefina Iglesias ◽  
Cecilio Hernández
Keyword(s):  
Corrosion Behaviour ◽  
Low Carbon Steel ◽  
Steel Corrosion ◽  
Corrosion Products ◽  
Urban Site ◽  
Low Carbon ◽  
Short Term ◽  
The Pacific ◽  
The Pacific Ocean ◽  
Time Of Wetness

A low-carbon steel A-36 and two conventional weathering steels A-588 and COR-420 exposed at four atmospheric test stations located in (i) Tocumen, an urban site near the Pacific Ocean, (ii) Sherman-Open, (iii) Sherman-Coastal, and (iv) Sherman-Breakwater on the Caribbean coast of Panama. Kinetics of the short-term atmospheric corrosion process and the relationship with exposure time and environmental characteristics of each site were investigated. The atmospheric exposure conditions, particularly the time of wetness, deposition of chloride, and the washing effect of contaminants on the metal surface by rain are of upmost importance in determining the corrosion behaviour and composition of rust. The corrosion products were mainly identified using room temperature and low temperature (80 K) Mössbauer spectroscopy, FTIR, and X-ray powder diffraction. In all samples,γ-FeOOH andα-FeOOH were the main constituents. Maghemite (γ-Fe2O3), magnetite (Fe3O4), and Akaganeite (β-FeOOH) were also identified.

Corrosion behaviour of boronized low carbon steel

1987 ◽  
Vol 18 (3) ◽  
pp. 295-303 ◽  
Author(s):  
D.N. Tsipas ◽  
H. Noguera ◽  
J. Rus
Keyword(s):  
Carbon Steel ◽  
Corrosion Behaviour ◽  
Low Carbon Steel ◽  
Low Carbon

Multi-objective optimization of high carbon steel (EN-31) and low carbon steel (SAE-1020) using Grey Taguchi method in rotary friction stir welding

2019 ◽  
Vol 9 (4) ◽  
pp. 385-400
Author(s):  
Kanwal Jit Singh
Keyword(s):  
Carbon Steel ◽  
Friction Welding ◽  
High Carbon Steel ◽  
Low Carbon Steel ◽  
Welding Process ◽  
Low Carbon ◽  
High Carbon ◽  
Content Type ◽  
Optimum Parameters ◽  
Rotary Friction Welding

Purpose Nowadays, a rotary friction welding method is accepted in many industries, particularly for joining dissimilar materials as a mass production process. It is due to advantages like less material waste, low production time and low energy expenditure. The effect of the change in carbon contents in steel is studied experimentally in the rotary friction welding process, and a statistical model is developed. The Grey Taguchi method gives the single parameters optimization for all output responses. The paper aims to discuss these issues. Design/methodology/approach An experimental setup was designed and produced to achieve the multi-response in single optimum parameters through Grey relational analysis. A continuous/direct drive rotary friction welding process is chosen in which transition from friction to the forging stage can be achieved automatically by applying a break. In this experimentation, high carbon and low carbon work-pieces with different carbon percentage were welded with rotary friction welding. Response tensile strength and micro-hardness of the design of the experiment are used to analyze the results. Findings The optimization of parameters has been performed with Grey relational analysis, and optimum parameters are friction pressure 40 kg/cm2, forging pressure 100 kg/cm2 and speed 1,120 rpm. GRA optimum parameters give 56.04 and 82.16 percent improvement in Tensile strength and micro-hardness, respectively. Practical implications High carbon steel (En-31) and low carbon steel (SAE-1020) are used in so many industrial applications. These materials are mostly used in the process like manufacturing, metallurgy, machinery, agricultural, etc. These practical applications have brought forward definite and notable economic benefits. Originality/value It provides a new framework to investigate the problems where multiple input machining variables and various output responses are obtained in single optimized parameters.

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