Studies on High-Temperature Corrosion resistance of low carbon Steel in Actual boiler environment

A low carbon steel was hot-dip aluminized, and corroded in the N2/0.4%H2S-mixed gas at 650-850°C for 20-50 h in order to find the effect of aluminizing on the high-temperature corrosion of the low carbon steel in the H2S environment. A thin Al topcoat and a thick Al-Fe alloy layer that consisted primarily of Al5Fe2 and some FeAl and Al3Fe formed on the surface after aluminizing. The corrosion rate increased with an increase in temperature. Hot-dip aluminizing increased the corrosion resistance of the carbon steel through forming a thin protective α-Al2O3 scale on the surface. The α-Al2O3 scale was susceptible to spallation. During corrosion, internal voids formed in the Al-Fe alloy layer, where the Al5Fe2, AlFe, and Al3Fe compounds gradually transformed through interdiffusion.

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CROLOY 7

Alloy Digest ◽

10.31399/asm.ad.sa0040 ◽

1956 ◽

Vol 5 (4) ◽

Keyword(s):

Fracture Toughness ◽

Corrosion Resistance ◽

High Temperature ◽

Carbon Steel ◽

Low Carbon Steel ◽

Heat Treating ◽

Oil Refinery ◽

High Temperature Strength ◽

Low Carbon ◽

Good Corrosion Resistance

Abstract CROLOY 7 is a 7% chromium-molybdenum low-carbon steel recommended for oil refinery corrosion resistance applications. It has very good corrosion resistance with good high temperature strength. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fracture toughness and creep. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SA-40. Producer or source: Babcock & Wilcox Company.

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B&W IRON

Alloy Digest ◽

10.31399/asm.ad.fe0035 ◽

1968 ◽

Vol 17 (8) ◽

Keyword(s):

Corrosion Resistance ◽

Carbon Steel ◽

Physical Properties ◽

Magnetic Permeability ◽

Electric Motor ◽

Low Carbon Steel ◽

Heat Treating ◽

Magnetic Characteristics ◽

Low Carbon ◽

High Magnetic Permeability

Abstract B and W IRON is a thoroughly killed, low carbon steel having a combination of ductility, toughness and high magnetic permeability. It is recommended for applications where good magnetic characteristics are of primary significance, such as in the manufacture of electric motor and generator housings. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Fe-35. Producer or source: Babcock & Wilcox Company.

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SAE 1020

Alloy Digest ◽

10.31399/asm.ad.cs0113 ◽

1987 ◽

Vol 36 (2) ◽

Keyword(s):

Fracture Toughness ◽

Corrosion Resistance ◽

Carbon Steel ◽

Low Carbon Steel ◽

Heat Treating ◽

Low Carbon ◽

Steel Mills ◽

Temperature Performance ◽

Wide Range ◽

Cold Worked

Abstract SAE 1020 is a low-carbon steel combining good machinability, workability and weldability. It is carburized for use in case-hardened components and it is used for a wide range of applications in the hot-worked, cold-worked, normalized or quenched-and-tempered conditions. Its many uses include bolts, rods, plate applications, machinery components, case-hardened parts, spinning tools and trimming dies. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on low temperature performance and corrosion resistance as well as heat treating, machining, joining, and surface treatment. Filing Code: CS-113. Producer or source: Carbon steel mills.

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USS 1/2% Cr-1/2% Mo

Alloy Digest ◽

10.31399/asm.ad.sa0245 ◽

1969 ◽

Vol 18 (10) ◽

Keyword(s):

United States ◽

Fracture Toughness ◽

High Temperature ◽

Carbon Steel ◽

Physical Properties ◽

Low Carbon Steel ◽

Heat Treating ◽

Low Carbon ◽

United States Steel Corporation ◽

Temperature Performance

Abstract USS 1/2% Cr-1/2% Mo is a low-alloy low-carbon steel recommended for use in steam service to reduce susceptibility to graphitization up to 950 F. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as fracture toughness and creep. It also includes information on high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: SA-245. Producer or source: United States Steel Corporation.

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WEIRKOTE PLUS

Alloy Digest ◽

10.31399/asm.ad.zn0041 ◽

1987 ◽

Vol 36 (6) ◽

Keyword(s):

Corrosion Resistance ◽

Aluminum Alloy ◽

Carbon Steel ◽

Physical Properties ◽

Deep Drawing ◽

Sheet Steel ◽

Low Carbon Steel ◽

Low Carbon ◽

Steel Corp ◽

Coated Sheet

Abstract WEIRKOTE PLUS is a Galfan-coated sheet steel. The sheet is conventional low-carbon steel normally used for galvanized sheets and strip. This digest will concentrate on the characteristics and properties of the Galfan coating which is nominally a 95% zinc-5% aluminum alloy. The coating on Weirkote Plus is ideal for a variety of tough applications. It is excellent for products that require deep drawing and it combines extra corrosion resistance with superior formability. This datasheet provides information on composition and physical properties. It also includes information on corrosion resistance as well as forming, joining, and surface treatment. Filing Code: Zn-41. Producer or source: Weirton Steel Corp.

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