Study on the growth and corrosion resistance of manganese phosphate coatings on 30CrMnMoTi alloy steel

The growth process and corrosion resistance of the phosphate coating on 25Cr2Ni4WA alloy steel fabricated by a high temperature manganese phosphating were investigated by XRD, SEM, EDS and electrochemical polarization method, respectively. It is found that the phosphate coating consists of lots of close packed lump crystallites and mainly composed of (Mn,Fe)5H2(PO4)4·4H2O. The coating weight increased rapidly, and then the increase rate slowed down when phosphating process was carried for about 5 min. The corrosion potentials of the phosphated steel shifted positively about 250 mV than the bare steel, indicating that the phosphating can improve the corrosion resistance of the 25Cr2Ni4WA alloy steel.

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Characteristics and corrosion studies of zinc–manganese phosphate coatings on magnesium–lithium alloy

RSC Advances ◽

10.1039/c4ra08122f ◽

2014 ◽

Vol 4 (104) ◽

pp. 59772-59778 ◽

Cited By ~ 15

Author(s):

Guixiang Wang ◽

Nana Cao ◽

Yangyang Wang

Keyword(s):

Corrosion Resistance ◽

Conversion Coatings ◽

Lithium Alloy ◽

Manganese Phosphate ◽

Phosphate Coatings ◽

Corrosion Studies

Zinc–manganese phosphate conversion coatings have been formed on magnesium–lithium alloy, enhancing the alloy's corrosion resistance.

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Effect of Sodium Nitrite Addition on the Corrosion Resistance of Manganese Phosphate Coating

Korean Society of Technical Education and Training ◽

10.29279/kostet.2020.25.3.43 ◽

2020 ◽

Vol 25 (3) ◽

pp. 43-50

Author(s):

Kyong-Sub Min

Keyword(s):

Corrosion Resistance ◽

Sodium Nitrite ◽

Coating Layer ◽

Phosphate Coating ◽

Nacl Solution ◽

Cross Sectional ◽

Manganese Phosphate ◽

Eds Analysis ◽

Phosphate Coatings ◽

Main Components

This paper describes an effective metal finishing technology for obtaining manganese phosphate coatings on steel. In this study, the effect of sodium nitrite addition on the corrosion resistance of a manganese phosphate coating was investigated. The microstructure, surface morphology, and chemical composition were analyzed by FE-SEM, EDS, and XRD, while the cross-sectional images and thickness of the coating layer were analyzed by FIB. According to the results of the EDS analysis, the main components of the manganese phosphate coating were C, O, P, Mn, and Fe. The XRD results showed that (Mn,Fe)5H2(PO4)4 4H2O in the manganese phosphate coating layer was formed by a chemical reaction between manganese phosphate and elements in the underlying carbon steel. Additionally, electrochemical polarization testing was carried out in order to evaluate the corrosion protection properties of the manganese phosphate coating in a 3.5 wt.% NaCl solution. The corrosion resistance of the phosphate coating was remarkably improved by adding sodium nitrite.

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On Corrosion Resistance Of Austenitic Stainless Steel Clad Layer on a Low Alloy Steel

Indian Science Cruiser ◽

10.24906/isc/2018/v32/i3/175445 ◽

2018 ◽

Vol 32 (3) ◽

pp. 20

Author(s):

Manas Kumar Saha ◽

Ritesh Hazra ◽

Ajit Mondal ◽

Santanu Das

Keyword(s):

Stainless Steel ◽

Corrosion Resistance ◽

Austenitic Stainless Steel ◽

Alloy Steel ◽

Low Alloy Steel ◽

Clad Layer

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AISI C1060

Alloy Digest ◽

10.31399/asm.ad.cs0032 ◽

1969 ◽

Vol 18 (12) ◽

Keyword(s):

Fracture Toughness ◽

Wear Resistance ◽

Corrosion Resistance ◽

Physical Properties ◽

Tensile Properties ◽

Alloy Steel ◽

Heat Treating ◽

Spring Steel ◽

High Carbon ◽

Steel Mills

Abstract AISI C1060 is a high-carbon water or oil hardening tool and spring steel recommended for heavy machinery parts, shafts, springs and miscellaneous tools requiring strength and wear resistance. 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 heat treating, machining, and joining. Filing Code: CS-32. Producer or source: Carbon and alloy steel mills.

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AISI 5135

Alloy Digest ◽

10.31399/asm.ad.sa0323 ◽

1976 ◽

Vol 25 (8) ◽

Keyword(s):

Corrosion Resistance ◽

Physical Properties ◽

Surface Treatment ◽

Tensile Properties ◽

Alloy Steel ◽

Heat Treating ◽

Steel Mills

Abstract AISI 5135 is a low-alloy, through-hardening steel containing nominally 0.95% chromium. It is recommended for applications where medium hardenability, moderate strength and low-to-moderate toughness are sufficient. It may be used in the unhardened (annealed, as-rolled, or normalized) condition or after quenching in oil followed by tempering. 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, joining, and surface treatment. Filing Code: SA-323. Producer or source: Alloy steel mills and foundries.

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SAE 4032

Alloy Digest ◽

10.31399/asm.ad.sa0319 ◽

1975 ◽

Vol 24 (9) ◽

Keyword(s):

Corrosion Resistance ◽

Physical Properties ◽

Surface Treatment ◽

Tensile Properties ◽

Alloy Steel ◽

Automobile Industry ◽

Temper Embrittlement ◽

Heat Treating ◽

Steel Mills

Abstract SAE 4032 is an alloy steel used extensively in the automobile industry. It combines moderate strength with good toughness in the quenched and tempered condition because it is relatively free from temper embrittlement when tempered in the range 850-1100 F. 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, joining, and surface treatment. Filing Code: SA-319. Producer or source: Alloy steel mills and foundries.

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NITRALLOY 125

Alloy Digest ◽

10.31399/asm.ad.sa0061 ◽

1957 ◽

Vol 6 (9) ◽

Keyword(s):

Fracture Toughness ◽

Corrosion Resistance ◽

Physical Properties ◽

Tensile Properties ◽

Alloy Steel ◽

Low Temperatures ◽

Heat Treating ◽

Ammonia Gas ◽

Steel Mills ◽

Special Alloy

Abstract NITRALLOY 125 (0.20-0.30% C) is a special alloy steel which can be nitrided, that is, surface hardened, without final quenching, by the action of ammonia gas at relatively low temperatures. Nitralloy 125 is also known as Nitralloy H. 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: SA-61. Producer or source: Alloy steel mills and foundries.

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ACI TYPE CF-12M

Alloy Digest ◽

10.31399/asm.ad.ss0167 ◽

1965 ◽

Vol 14 (4) ◽

Keyword(s):

Fracture Toughness ◽

Stainless Steel ◽

Corrosion Resistance ◽

High Temperature ◽

Physical Properties ◽

Tensile Properties ◽

Alloy Steel ◽

Elevated Temperatures ◽

Heat Treating ◽

Temperature Performance

Abstract Type CF-12M is a chromium-nickel-molybdenum alloy steel having corrosion resistance and good strength at moderately elevated temperatures. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness and creep. It also includes information on low and high temperature performance, and corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: SS-167. Producer or source: Stainless steel foundries.

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USS AR 360

Alloy Digest ◽

10.31399/asm.ad.sa0332 ◽

1977 ◽

Vol 26 (5) ◽

Keyword(s):

United States ◽

Corrosion Resistance ◽

Surface Treatment ◽

Tensile Properties ◽

Alloy Steel ◽

Heat Treating ◽

Low Alloy Steel ◽

Materials Handling ◽

United States Steel Corporation ◽

Major Consideration

Abstract USS AR 360 is a quenched-and-tempered low-alloy steel designed to fit a broad range of applications where resistance to abrasion is a major consideration. It is used to produce components for mining and materials handling equipment and agricultural implements. This datasheet provides information on composition, hardness, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, joining, and surface treatment. Filing Code: SA-332. Producer or source: United States Steel Corporation.

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