EFFECT OF MAGNETRON-SPUTTERED Al FILM ON LOW-TEMPERATURE PACK-ALUMINIZING COATING FOR OIL CASING STEEL N80

2014 ◽  
Vol 21 (04) ◽  
pp. 1450053 ◽  
Author(s):  
MIN HUANG ◽  
YU WANG ◽  
MENG-XIAN ZHANG ◽  
YAN-QIU HUO ◽  
PENG-JIN GAO
Keyword(s):  
Corrosion Resistance ◽  
Low Temperature ◽  
Aluminide Coating ◽  
Iron Aluminide ◽  
Concentration Change ◽  
Corrosion Condition ◽  
Pack Aluminizing ◽  
Aluminide Layer ◽  
Positive Effect

Low-temperature aluminizing coating was prepared onto the surface of oil casing steel N 80 with a magnetron-sputtered Al film to improve its corrosion resistance. Results show that magnetron-sputtered Al film is able to form gradient aluminide coating, composed of iron aluminide FeAl 3, Fe 2 Al 5 and Fe 3 Al with different contents of aluminum. Both the density and continuity of iron aluminide layer for oil casing steel N 80 with magnetron-sputtered Al film can be improved. Under the same corrosion condition, aluminized oil casing steel N 80 with a magnetron-sputtered Al film shows an outstanding corrosion resistance than those of original and aluminized ones without magnetron-sputtered Al film. The positive effect of Al film is considered as the concentration change of active Al atom for diffusion to form the aluminizing coating during the pack processing.

Aluminizing Mechanism and Corrosion Resistance of Pipeline Steel X80 by Combined Pack Cementation Process under Low Temperature

2011 ◽  
Vol 194-196 ◽  
pp. 232-236
Author(s):  
Min Huang ◽  
Yu Wang ◽  
Xiang Hong Lv
Keyword(s):  
Corrosion Resistance ◽  
Low Temperature ◽  
Pipeline Steel ◽  
Element Distribution ◽  
Surface Mechanical Attrition Treatment ◽  
Gradual Change ◽  
Mechanical Attrition ◽  
Pack Aluminizing ◽  
Aluminide Layer ◽  
Pack Cementation Process

In order to improve the corrosion resistance of pipeline steel X80 and maintain its good mechanical properties simultaneously, a low-temperature pack aluminizing process was carried out at 723 K on pipeline steel X80 after a surface mechanical attrition treatment (SMAT). The phase composition, microstructure and element distribution of the as-aluminized pipeline steel X80 were characterized by XRD, SEM and EDS, respectively.The results show that the as-received aluminide layer consists of Fe2Al5, which exhibits a good cohesion with SMATed pipeline steel X80 substrate with the thickness of around 90 μm. The element concentrations of Al and Fe atoms show a gradual change in the range of aluminide layer. After corrosion test processed in 3.5% NaCl solution, there is no obvious corrosion crack or uphills piled up by corrosion products on the surface of as-aluminized SMATed pipeline steel, which can conclude that pack aluminizing assisting by SMAT at low-temperature is an effective way for protecting pipeline steel X80 against corrosion.

Aluminizing Coating Prepared on Oil Casing Steel N80 by Low-Temperature Pack Cementation

2011 ◽  
Vol 368-373 ◽  
pp. 2180-2184
Author(s):  
Yu Wang ◽  
Min Huang
Keyword(s):  
Corrosion Resistance ◽  
Low Temperature ◽  
Aluminide Coating ◽  
Electrochemical Corrosion ◽  
Hardness Test ◽  
Element Distribution ◽  
Pack Cementation ◽  
Mechanical Attrition ◽  
Pre Treatment ◽  
Steel Substrates

Aluminizing has been verified to be an effective way to improve the corrosion resistance of steel due to the formation of continuous Al2O3layer, but traditional aluminizing processing carried out at high temperature can not be used to prepare aluminide layer on the surface of oil casing steel. In this paper, an aluminide coating was prepared on oil casing steel N80 by a low-temperature pack cementation only at 803 K for 2 hours by adding zinc in the pack powder and pre-treatment of N80 substrate by surface mechanical attrition. The phase compostion, microstructure, element distribution and properties of as-aluminized oil casing steel N80 were characterized by means of XRD, SEM, EDS, micro-hardness test and electrochemical corrosion measurements. The results indicate that aluminide coating mainly consists of FeAl3, Fe2Al5 and FeAl. The continuous aluminide coating with an average thickness around 50 μm could be successfully formed on the surface of oil casing steel N80 which shows a good coherence with as-packed substrate. After preparation of aluminide coating, oil casing steel N80 shows a higher microhardness in the range of aluminizing coating than that of the virgin material because of the formation of iron aluminide. The exception noted is that the proposed low-temperature aluminizing processing does not have any damaging impact on the mechanical properties of steel substrates. Moreover, it is concluded that oil casing steel N80 with aluminizing coating shows a better corrosion resistance than that of original N80 by analyzing of electrochemical test results.

CORROSION RESISTANT CERAMIC COATING FOR X80 PIPELINE STEEL BY LOW-TEMPERATURE PACK ALUMINIZING AND OXIDATION TREATMENT

2013 ◽  
Vol 20 (06) ◽  
pp. 1350063
Author(s):  
HUANG MIN ◽  
FU QIAN-GANG ◽  
WANG YU ◽  
ZHONG WEN-WU
Keyword(s):  
Corrosion Resistance ◽  
Low Temperature ◽  
Ceramic Coating ◽  
Pipeline Steel ◽  
Ceramic Coatings ◽  
X80 Pipeline Steel ◽  
Oxidation Treatment ◽  
Pack Aluminizing ◽  
Steel Substrates ◽  
Al Coating

In this paper, we discuss the formation of ceramic coatings by a combined processing of low-temperature pack aluminizing and oxidation treatment on the surface of X80 pipeline steel substrates in order to improve the corrosion resistance ability of X80 pipeline steel. First, Fe - Al coating consisting of FeAl 3 and Fe 2 Al 5 was prepared by a low-temperature pack aluminizing at 803 K which was fulfilled by adding zinc in the pack powder. Pre-treatment of X80 pipeline steel was carried out through surface mechanical attrition treatment (SMAT). Further oxidation treatment of as-aluminized sample was carried out in the CVD reactor at 833 K under oxygen containing atmosphere. After 1 h duration in these conditions, ceramic coating consisting of α- Al 2 O 3 was formed by in situ oxidation reaction of Fe - Al coating. Those coatings have been characterized by different techniques including X-ray diffraction (XRD), scanning electron microscope (SEM) and energy dispersive spectroscope (EDS), respectively. Ceramic coating shows a dense and uniform microstructure, and exhibits good coherences with X80 pipeline steel substrates. By electrochemical corrosion test, the self-corrosion current density of X80 pipeline steel with as-obtained ceramics coating in 3.5% NaCl solution shows an obvious decrease. The formation of α- Al 2 O 3 ceramic coating is considered as the main reason for the corrosion resistance improvement of X80 pipeline steel.

OXIDATION RESISTANCE OF LOW-TEMPERATURE PACK ALUMINIZING COATINGS ON NI-BASE SUPERALLOY

2010 ◽  
Vol 24 (15n16) ◽  
pp. 3185-3189 ◽  
Author(s):  
BIFEI YUAN ◽  
LONGWEN YU ◽  
GUIWU LU
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Oxidation Resistance ◽  
High Temperature Oxidation ◽  
Aluminide Coating ◽  
Nickel Base Superalloy ◽  
Temperature Oxidation ◽  
Pack Aluminizing ◽  
Nickel Base ◽  
Base Superalloy

A nickel-base superalloy has been used to deposit the aluminide coating by low-temperature pack cementation process. The high temperature oxidation tests on aluminized alloys and the uncoated specimens are carried out at 1000°C for 10h. It is observed that a dense and protective Al 2 O 3 surface layer is produced on the aluminized alloy, and the aluminizing process has greatly enhanced the high temperature oxidation resistance of the Ni -base superalloy at 1000°C. As a contrast, the uncoated specimen begins to be failure when treated only for 6h at the same temperature.

ISO-ELASTIC

Alloy Digest ◽  
1957 ◽  
Vol 6 (8) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Low Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Temperature Coefficient ◽  
Nickel Alloy ◽  
Modulus Of Elasticity ◽  
Heat Treating ◽  
Precision Instrument ◽  
Iron Nickel

Abstract ISO-ELASTIC is an iron-nickel alloy having low temperature coefficient of the modulus of elasticity. It is suitable for precision instrument springs. 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, and machining. Filing Code: Fe-14. Producer or source: John Chatillon & Sons.

COPPER ALLOY No. 510

Alloy Digest ◽  
1971 ◽  
Vol 20 (8) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Low Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Copper Alloy ◽  
High Strength ◽  
Heat Treating ◽  
Fatigue Properties ◽  
Temperature Performance ◽  
Tin Bronze

Abstract COPPER ALLOY No. 510 is a tin bronze containing about 0.25% phosphorus. It combines high strength and toughness with excellent fatigue properties. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep and fatigue. It also includes information on low temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-238. Producer or source: Brass mills.

AMPCOLOY 495

Alloy Digest ◽  
1966 ◽  
Vol 15 (11) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Shear Strength ◽  
Low Temperature ◽  
Physical Properties ◽  
High Strength ◽  
Heat Treating ◽  
Aluminum Bronze ◽  
High Manganese ◽  
Temperature Performance

Abstract AMPCOLOY 495 is a high manganese type of aluminum bronze recommended where high strength and corrosion resistance are required along with good weldability. It is recommended for marine equipment and ship propellers. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive and shear strength as well as fracture toughness, creep, and fatigue. It also includes information on low temperature performance and corrosion resistance as well as casting, forming, heat treating, machining, and joining. Filing Code: Cu-171. Producer or source: Ampco Metal Inc..

ALMAR 20

Alloy Digest ◽  
1964 ◽  
Vol 13 (4) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Low Temperature ◽  
Solid Fuel ◽  
Precipitation Hardening ◽  
Martensitic Steel ◽  
Heat Treating ◽  
Aircraft Landing ◽  
Temperature Performance ◽  
Aircraft Landing Gear ◽  
High Nickel

Abstract ALMAR 20 is a high nickel martensitic steel which is strengthened by precipitation hardening. It has excellent combination of strength and toughness particularly in the presence of notches and cracks. It is recommended for applications such as solid fuel rocket cases and aircraft landing gear. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on low temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: SA-162. Producer or source: Allegheny Ludlum Corporation.

BOFORS 2RM2

Alloy Digest ◽  
1965 ◽  
Vol 14 (5) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Low Temperature ◽  
Mechanical Strength ◽  
Physical Properties ◽  
Tensile Properties ◽  
Cast Steel ◽  
Heat Treating ◽  
High Mechanical Strength ◽  
Temperature Performance

Abstract BOFORS 2RM2 is a hardenable stainless cast steel having good weldability, high mechanical strength and improved corrosion resistance. 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 casting, forming, heat treating, machining, and joining. Filing Code: SS-169. Producer or source: Aktiebolaget Bofors.

AWHF STEEL

Alloy Digest ◽  
1972 ◽  
Vol 21 (6) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Shear Strength ◽  
Low Temperature ◽  
Physical Properties ◽  
Heat Treating ◽  
Steel Company ◽  
Cold Forming ◽  
Temperature Performance ◽  
Minimum Yield

Abstract AWHF STEEL is a high-formability steel produced regularly at minimum yield strengths of 45,000 and 50,000 psi and for special applications at 55,000 and 60,000 psi. It is recommended for difficult cold-forming applications that involve bending or drawing and it has good weldability. This datasheet provides information on composition, physical properties, elasticity, tensile properties, and compressive and shear strength as well as fracture toughness and fatigue. It also includes information on low temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: SA-275. Producer or source: Alan Wood Steel Company.

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