Specification for carbon steel welded horizontal cylindrical storage tanks

2015 ◽  
Keyword(s):  
Carbon Steel ◽  
Storage Tanks

scholarly journals Effect of Bacillus megaterium Biofilm and its Metabolites at Various Concentration Biodiesel on the Corrosion of Carbon Steel Storage Tank

2021 ◽  
Vol 12 (4) ◽  
pp. 5698-5708
Keyword(s):  
Carbon Steel ◽  
Corrosion Rate ◽  
Bacillus Megaterium ◽  
Storage Tank ◽  
Diesel Oil ◽  
Corrosion Process ◽  
Gravimetric Analysis ◽  
Storage Tanks ◽  
Acid Metabolites ◽  
Metabolites Production

Microorganisms in biodiesel storage tanks may generate bio-corrosion due to their hygroscopic and susceptible fuel degradation. The organisms, including Bacillus megaterium present in the hydrocarbons, resulted from the EPS and metabolites processes that subsequently control the corrosion process of the tank. This present study examined the effect of biodiesel concentration on microbial activity through TPC analyzing growth for B. megaterium. Furthermore, this study investigated EPS formation and acid metabolites production by B. megaterium based on SEM observations and acidimetric titration. Meanwhile, this study investigated the microorganism-induced corrosion impact based on gravimetric analysis. The results explained a higher biodiesel concentration in diesel oil promoted an increase in the growth of B. megaterium and the corrosion rate. Conversely, the acid metabolites produced from bacteria under the biofilm did not significantly increase the corrosion rate. Corrosion products resulting from the B. megaterium activity on the surface of the steel included Iron (II, III) oxide (Fe2O3 and Fe3O4). The formation of oxide and pitting may control the strength of the surface tank in the course of biofuel storage, which may lead to the failure of the material.

Use of the Polarization Technique To Study Corrosion in Aqueous Ammonia Systems

CORROSION ◽  
1962 ◽  
Vol 18 (3) ◽  
pp. 85t-90t ◽  
Author(s):  
L. M. DVORACEK ◽  
L L NEFF
Keyword(s):  
Carbon Steel ◽  
Aqueous Ammonia ◽  
Laboratory Data ◽  
Polarization Curves ◽  
Storage Tanks ◽  
Internal Corrosion ◽  
Polarization Technique ◽  
Corrosion Problem ◽  
Corrosion Of Steel ◽  
Stable Passive

Abstract Severe internal corrosion of certain carbon steel storage tanks in Honolulu which contained aqueous ammonia solutions, 25 percent by weight ammonia, prompted investigation of this unusual corrosion problem in the laboratory by the polarization technique. Interpretation of polarization curves obtained with steel electrodes exposed to different environments indicated that oxygen is the major factor in the corrosion of steel by aqueous ammonia solutions. However, corrosion of carbon steel can occur in both oxygen-containing and oxygen-depleted solutions. Corrosion of carbon steel in oxygen-containing solutions is caused by activation through removal of oxygen, or by the presence of large areas of mill scale on carbon steel in oxygen-depleted solutions. Anodic polarization curves revealed that carbon steel in both oxygen-containing and oxygen-depleted ammonia solutions can be made passive. A stable passive potential or state was observed for carbon steel in the oxygen-containing system, but not in the oxygen-depleted system. Laboratory data for these environments indicated that anodic or cathodic protection can be applied to control the corrosion. 2.3.5, 4.3.3

scholarly journals Locating and Quantifying Carbon Steel Corrosion Rates Linked to Fungal B20 Biodiesel Degradation

2021 ◽  
Author(s):  
James G. Floyd ◽  
Blake W. Stamps ◽  
Wendy J. Goodson ◽  
Bradley S. Stevenson
Keyword(s):  
Carbon Steel ◽  
Methyl Esters ◽  
Fungal Growth ◽  
Steel Corrosion ◽  
The United States ◽  
Microbiologically Influenced Corrosion ◽  
Valuable Insight ◽  
Storage Tanks ◽  
Corrosion Rates ◽  
Biodiesel Fuels

Fungi that degrade B20 biodiesel in storage tanks have also been linked to microbiologically influenced corrosion (MIC). A member of the filamentous fungal genus Byssochlamys , and a yeast from the genus Wickerhamomyces were isolated from heavily contaminated B20 storage tanks from multiple Air Force bases. Although these taxa were linked to microbiologically influenced corrosion in situ , precise measurement of their corrosion rates and pitting severity on carbon steel was not available. In the experiments described here, we directly link fungal growth on B20 biodiesel to higher corrosion rates and pitting corrosion of carbon steel under controlled conditions. When these fungi were growing solely on B20 biodiesel for carbon and energy, consumption of FAME and n-alkanes was observed. The corrosion rates for both fungi were highest at the interface between the B20 biodiesel and the aqueous medium, where they acidified the medium and produced deeper pits than abiotic controls. Byssochlamys produced the most corrosion of carbon steel and produced the greatest pitting damage. This study characterizes and quantifies the corrosion of carbon steel by fungi that are common in fouled B20 biodiesel through their metabolism of the fuel, providing valuable insight for assessing MIC associated with storage and dispensing B20 biodiesel. IMPORTANCE Biodiesel is widely used across the United States and worldwide, blended with ultralow sulfur diesel in various concentrations. In this study we were able to demonstrate that the filamentous fungi Byssochlamys AF004 and the yeast Wickerhamomyces SE3 were able to degrade fatty acid methyl esters and alkanes in biodiesel causing increases in acidity. Both fungi also accelerated the corrosion of carbon steel, especially at the interface of the fuel and water, where their biofilms were located. This research provides controlled, quantified measurements and the localization of microbiologically influenced corrosion caused by common fungal contaminants in biodiesel fuels.

Corrosion testing device for in-situ corrosion characterization in operational molten salts storage tanks: A516 Gr70 carbon steel performance under molten salts exposure

2016 ◽  
Vol 157 ◽  
pp. 383-392 ◽  
Author(s):  
F. Javier Ruiz-Cabañas ◽  
Cristina Prieto ◽  
Rafael Osuna ◽  
Virginia Madina ◽  
A. Inés Fernández ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Molten Salts ◽  
Corrosion Testing ◽  
Testing Device ◽  
Storage Tanks

scholarly journals Locating and Quantifying Carbon Steel Corrosion Rates Linked to Fungal B20 Biodiesel Degradation

2021 ◽  
Author(s):  
James G Floyd ◽  
Blake W Stamps ◽  
Wendy J Crookes-Goodson ◽  
Bradley Scott Stevenson
Keyword(s):  
Carbon Steel ◽  
Air Force ◽  
Fungal Growth ◽  
Steel Corrosion ◽  
Microbiologically Influenced Corrosion ◽  
Valuable Insight ◽  
Storage Tanks ◽  
Corrosion Rates ◽  
Abiotic Controls

Fungi that degrade B20 biodiesel in storage tanks have also been linked to microbiologically influenced corrosion (MIC). A member of the filamentous fungal genus Byssochlamys, and a yeast from the genus Wickerhamomyces were isolated from heavily contaminated B20 storage tanks from multiple Air Force bases. Although these taxa were linked to microbiologically influenced corrosion in situ, precise measurement of their corrosion rates and pitting severity on carbon steel was not available. In the experiments described here, we directly link fungal growth on B20 biodiesel to higher corrosion rates and pitting corrosion of carbon steel under controlled conditions. When these fungi were growing solely on B20 biodiesel for carbon and energy, consumption of FAME and n-alkanes was observed. The corrosion rates for both fungi were highest at the interface between the B20 biodiesel and the aqueous medium, where they acidified the medium and produced deeper pits than abiotic controls. Byssochlamys produced the most corrosion of carbon steel and produced the greatest pitting damage. This study characterizes and quantifies the corrosion of carbon steel by fungi that are common in fouled B20 biodiesel through their metabolism of the fuel, providing valuable insight for assessing MIC associated with storage and dispensing B20 biodiesel.

JLX - W

Alloy Digest ◽  
1964 ◽  
Vol 13 (8) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Carbon Steel ◽  
Physical Properties ◽  
High Strength ◽  
Heat Treating ◽  
Storage Tanks ◽  
Weight Saving ◽  
Forming Characteristics ◽  
Minimum Yield

Abstract JLX-W is a columbium-bearing carbon steel produced in four grades according to the minimum yield point. It has good forming characteristics and excellent weldability. It is recommended where high strength and weight saving are required, such as freight cars, trucks, storage tanks, etc. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: CS-21. Producer or source: Jones & Laughlin Steel Corporation.

Sign in / Sign up

Export Citation Format

Share Document