scholarly journals Atmospheric Corrosion Rates of Copper, Galvanized Steel, Carbon Steel and Aluminum in the Metropolitan Region of Salvador, BA, Northeast Brazil

2012 ◽  
Vol 42 ◽  
pp. 171-185 ◽  
Author(s):  
M.O.G. Portella ◽  
K.F. Portella ◽  
P.A.M. Pereira ◽  
P.C. Inone ◽  
K.J.C. Brambilla ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Atmospheric Corrosion ◽  
Galvanized Steel ◽  
Metropolitan Region ◽  
Northeast Brazil ◽  
Corrosion Rates

scholarly journals A Field Study of Atmospheric Corrosion of Carbon Steel after Short Exposure in Pelabuhan Ratu, West Java Province, Indonesia

2021 ◽  
Vol 18 (17) ◽  
Author(s):  
Gadang PRIYOTOMO ◽  
Siska PRIFIHARNI ◽  
Lutviasari NURAINI ◽  
Joko TRIWARDONO ◽  
Ahmad ROYANI ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Relative Humidity ◽  
Air Temperature ◽  
Atmospheric Corrosion ◽  
Short Exposure ◽  
Corrosion Attack ◽  
West Java ◽  
Corrosion Rates ◽  
Magnetite Fe3o4 ◽  
Chloride Deposition

The investigation of atmospheric corrosion of mild carbon steel as representative of offshore infrastructure has been carried out in the marine tropical of Pelabuhan Ratu, West Java, Indonesia. They are exposed up to 76 days of periods, and their corrosion rates are determined according to ASTM G1-03. The surface morphology, the elemental compositions and compounds were observed using a scanning electron microscope (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD), respectively.  The environmental parameters of the test site are monitored during exposure, such as air temperature, relative humidity (RH), airborne salinity and dew temperature. Based on the results, the corrosion rates of steels were 2.79 and 2.8 mpy within the 27 and 76 days exposures, respectively. The presence of chloride deposition on the surface of steel can increase the severity of corrosion. Moreover, the detrimental effect of chloride was observed in rust product, which was covered by an oxygen element. The main phases of rust products present were magnetite (Fe3O4) and hematite (α-Fe2O3.H2O). Several cracks were observed in the rust layer, which tended to exfoliate and lose adherence and protectiveness from further corrosion attack. HIGHLIGHTS The presence of chloride deposition on the surface of steel can increase the severity of corrosion. The severity of corrosion attack mainly depends on the exposure time and some climatic parameters, such as relative humidity (RH), air temperature and chloride airborne. The uniform distribution of the chloride tends to increase the production of ferrous chloride in high RH condition and the aqueous layer deposited on carbon steel. There are two phases on corroded carbon steel such as hematite (α-Fe2O3.H2O) and Magnetite (Fe3O4) after exposure GRAPHICAL ABSTRACT

scholarly journals DETERMINATION OF ATMOSPHERIC CORROSION RATE OF METALS IN 12 VIETNAMESE AREAS

2018 ◽  
Vol 55 (5B) ◽  
pp. 272
Author(s):  
Pham Duy Nam
Keyword(s):  
Carbon Steel ◽  
Corrosion Rate ◽  
Rural Areas ◽  
Atmospheric Corrosion ◽  
Climatic Factors ◽  
Air Pollutant ◽  
Climatic Data ◽  
Corrosion Rates ◽  
Copper Aluminum

The corrosion of materials is a result of complex impact from many climatic factors such as temperature, humidity, air pollutant content in the air, rainfall etc. In addition, the corrosion rate of metals can be measured. Each climatic zone is characterized by its corrosion rate. This article presents the testing results to determine the corrosion rate of carbon steel, copper, aluminum and zinc in 12 districts characterizing different climate zones of Vietnam. Testing, evaluation, and classification of atmospheric corrosion were conducted in accordance with the standard ISO 9223. The results show that for all types of studied metals, their corrosion rates which are determined from climatic data are higher than the corrosion rates in reality, especially for carbon steel and aluminum. This difference is more visible in the rural areas.

scholarly journals Corrosiveness of Thermally Modified Wood

Forests ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 50 ◽  
Author(s):  
Samuel Zelinka ◽  
Leandro Passarini ◽  
Frederick Matt ◽  
Grant Kirker
Keyword(s):  
Stainless Steel ◽  
Carbon Steel ◽  
Water Vapor Sorption ◽  
Thermal Modification ◽  
Wood Products ◽  
Galvanized Steel ◽  
Exposure Test ◽  
Corrosion Rates ◽  
Thermally Modified Wood ◽  
Modified Wood

Thermally modified wood is becoming commercially available in North America for use in outdoor applications. While there have been many studies on how thermal modification affects the dimensional stability, water vapor sorption, and biodeterioration of wood, little is known about whether thermally modified wood is corrosive to metal fasteners and hangers used to hold these members in place. As thermally modified wood is used in outdoor applications, it has the potential to become wet which may lead to corrosion of embedded fasteners. Here, we examine the corrosiveness of thermally modified ash and oak in an exposure test where stainless steel, hot-dip galvanized steel, and carbon steel nails are driven into wood and exposed to a nearly 100% relative humidity environment at 27 °C for one year. The corrosion rates were compared against control specimens of untreated and preservative-treated southern pine. Stainless steel fasteners did not corrode in any specimens regardless of the treatment. The thermal modification increased the corrosiveness of the ash and oak, however, an oil treatment that is commonly applied by the manufacturer to the wood after the heat treatment reduced the corrosiveness. The carbon steel fasteners exhibited higher corrosion rates in the thermally modified hardwoods than in the preservative-treated pine control. Corrosion rates of galvanized fasteners in the hardwoods were much lower than carbon steel fasteners. These data can be used to design for corrosion when building with thermally modified wood, and highlight differences between corrosion of metals embedded in wood products.

Investigation of the Corrosion Resistance of Weathering Steel at Different Atmospheric Environment

2012 ◽  
Vol 629 ◽  
pp. 240-244
Author(s):  
Zhi Fen Wang ◽  
Jian Rong Liu ◽  
Li Xin Wu ◽  
Yi Qiang Sun ◽  
Rong Dong Han
Keyword(s):  
Corrosion Resistance ◽  
Carbon Steel ◽  
Atmospheric Corrosion ◽  
Atmospheric Environment ◽  
Weathering Steel ◽  
Rust Layer ◽  
Corrosion Rates ◽  
Two Cities ◽  
Environment Factor

The corrosion resistances of a weathering steel SPA-H and a carbon steel Q345 after atmospheric corrosion rests of two cities were measured. The results showed that the corrosion resistance was better for SPA-H than Q345 based on the corrosion rate. The corrosion rates of two steels at Qionghai city were lower than those of Jiangjin city. The characterization of the rusts showed the rust layer on SPA-H was denser and thinner than that of Q345. The rust layers were mainly composed of goethite (α-FeOOH) with a few of lepidocrocite (γ-FeOOH). SPA-H had better weatherability attributed to the alloying elements of copper, chromium and phosphorus enriched in the rust layer. The environment factor such as the sedimentation of SO2 has more effect on the corrosion rates than other factors such as alloy elements.

Study on the effect of atmospheric corrosion on mechanical properties with impact test: Carbon steel and Galvanized steel

2019 ◽  
Vol 70 (7) ◽  
pp. 1151-1161 ◽  
Author(s):  
Rosa Vera ◽  
Raquel Araya ◽  
Carolina Garín ◽  
Sebastián Ossandón ◽  
Paula Rojas
Keyword(s):  
Mechanical Properties ◽  
Carbon Steel ◽  
Atmospheric Corrosion ◽  
Impact Test ◽  
Galvanized Steel

scholarly journals The Influence of Test-Panel Orientation and Exposure Angle on the Corrosion Rate of Carbon Steel. Mathematical Modelling

Metals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 196
Author(s):  
Juan J. Santana ◽  
Víctor Cano ◽  
Helena C. Vasconcelos ◽  
Ricardo M. Souto
Keyword(s):  
Mathematical Model ◽  
Carbon Steel ◽  
Atmospheric Corrosion ◽  
Test Panel ◽  
Marine Atmosphere ◽  
Corrosion Rates ◽  
Qualitative Variables ◽  
Logarithmic Law ◽  
Time Of Wetness ◽  
Good Agreement

The effects of both test-panel orientation and exposure angle on the atmospheric corrosion rates of carbon steel probes exposed to a marine atmosphere were investigated. Test samples were exposed in a tree-shape metallic frame with either three exposure angles of 30°, 45° and 60° and orientation north-northeast (N-NE), or eight different orientation angles around a circumference. It was found that the experimental corrosion rates of carbon steel decreased for the specimens exposed with greater exposure angles, whereas the highest corrosion rates were found for those oriented to N-NE due to the influence of the prevailing winds. The obtained data obtained were fitted using the bi-logarithmic law and its variations as to take in account the amounts of pollutants and the time of wetness (TOW) for each particular case with somewhat good agreement, although these models failed when all the effects were considered simultaneously. In this work, we propose a new mathematical model including qualitative variables to account for the effects of both exposure and orientation angles while producing the highest quality fits. The goodness of the fit was used to determine the performance of the mathematical models.

Effects of Deformation on Atmospheric Corrosion of Galvanized Steel

2006 ◽  
Vol 510-511 ◽  
pp. 1134-1137
Author(s):  
Jae Woong Choi ◽  
Gil Ho Hwang ◽  
Hong Rae Cha ◽  
Sung Goon Kang
Keyword(s):  
Relative Humidity ◽  
Corrosion Test ◽  
Atmospheric Corrosion ◽  
Surface Damage ◽  
Corrosion Products ◽  
Galvanized Steel ◽  
Accelerated Corrosion ◽  
Corrosion Rates ◽  
Accelerated Corrosion Test ◽  
Surface Morphologies

The effects of deformation on corrosion behavior of galvanized steel were investigated. Accelerated corrosion test was conducted under the conditions of 30oC and 90% relative humidity with flowing 200ppm sulfur dioxide gas for five weeks. Surface morphologies and corrosion products were analyzed by SEM/EDS and XRD. The corrosion products were composed of hydrates of ZnSO4. And corrosion rates of each part, bottom, bended and wall, were increased with growing strain due to surface damage and enlargement of naked surface for corrosion.

scholarly journals Atmospheric Corrosion Behavior of Carbon Steel and Galvanized Steel after Exposure in Eretan and Ciwaringin, West Java Province, Indonesia

2020 ◽  
Vol 20 (5) ◽  
pp. 1032
Author(s):  
Gadang Priyotomo ◽  
Lutviasari Nuraini ◽  
Siska Prifiharni ◽  
Ahmad Royani ◽  
Sundjono Sundjono ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Corrosion Rate ◽  
Corrosion Behavior ◽  
Chloride Ion ◽  
Galvanized Steel ◽  
Uniform Corrosion ◽  
Corrosion Attack ◽  
West Java ◽  
Corrosion Rates ◽  
Weight Loss Method

The investigation of corrosion for carbon steel and galvanized steel has been conducted in the marine atmosphere of Eretan and Ciwaringin Districts, West Java Province. The exposure time of the field test was up to 200 days, and their corrosion rates are determined according to weight loss method. The objective of the work is to elucidate the corrosion behavior of those alloys which is affected by distances from coastline and environmental condition. The magnitude of corrosion rate for carbon steel was 20 times as high as that for galvanized steel in both districts The distance from coastline has significantly affected for the magnitude of corrosion rate, where that both alloys in Ciwaringin is lower than that in Eretan. The deposition of chloride ion in Eretan and Ciwaringin Districts were 4.305 mg/m2 day and 1.863 mg/m2 day, respectively, where the higher chloride ion can tend to increase the corrosion rates. Relative humidity (RH) which is over 60% has essential role for corrosion process as well as rainfall. The uniform corrosion attack was observed both alloys after exposure. The corrosion product phases of galvanized steel exhibits as zincite, hydrozincite and simonkolleite in Eretan as the typical coastline atmosphere phases but not in Ciwaringin. The formation of rust product for both metals lead the decrease of further corrosion attack due to the barrier between metal and environment. The usage of galvanized steel is remarkable to minimize corrosion attack compared to that of carbon steel in tropical coastline.

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