Enhanced High Temperature Corrosion Resistance of Al 2 O 3 /Al Composite Coating on  γ -TiAl Alloy

Abstract INCONEL ALLOY 671 is a nickel-chromium alloy having excellent resistance to high-temperature corrosion. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ni-180. Producer or source: Huntington Alloy Products Division, An INCO Company.

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ACI TYPE HN

Alloy Digest ◽

10.31399/asm.ad.ss0410 ◽

1982 ◽

Vol 31 (6) ◽

Keyword(s):

Stainless Steel ◽

Corrosion Resistance ◽

High Temperature ◽

Steel Casting ◽

Nickel Content ◽

Heat Treating ◽

High Temperature Corrosion ◽

Temperature Performance ◽

Wide Range ◽

Iron Chromium

Abstract Type HN is an iron-chromium-nickel alloy containing sufficient chromium for good high-temperature corrosion resistance and with nickel content in excess of the chromium. This alloy has properties somewhat similar to the more widely used ACI Type HT alloy but with better ductility. Type HN is used for highly stressed components in the 1800-2000 F temperature range. It is used in the aircraft, automotive, petroleum, petrochemical and power industries for a wide range of components and parts. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: SS-410. Producer or source: Various stainless steel casting companies.

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Exploring the Effect of Silicon on the High Temperature Corrosion of Lean FeCrAl Alloys in Humid Air

Oxidation of Metals ◽

10.1007/s11085-020-10019-2 ◽

2021 ◽

Author(s):

T. Sand ◽

A. Edgren ◽

C. Geers ◽

V. Asokan ◽

J. Eklund ◽

...

Keyword(s):

Corrosion Resistance ◽

High Temperature ◽

Oxidation Behavior ◽

High Temperature Corrosion ◽

The Other ◽

Oxide Scales ◽

Protective Oxide ◽

New Approach ◽

Fecral Alloys ◽

Cr Evaporation

AbstractA new approach to reduce the chromium and aluminium concentrations in FeCrAl alloys without significantly impairing corrosion resistance is to alloy with 1–2 wt.% silicon. This paper investigates the “silicon effect” on oxidation by comparing the oxidation behavior and scale microstructure of two FeCrAl alloys, one alloyed with silicon and the other not, in dry and wet air at 600 °C and 800 °C. Both alloys formed thin protective oxide scales and the Cr-evaporation rates were small. In wet air at 800 °C the Si-alloyed FeCrAl formed an oxide scale containing mullite and tridymite together with α- and γ-alumina. It is suggested that the reported improvement of the corrosion resistance of Al- and Cr-lean FeCrAl’s by silicon alloying is caused by the appearance of Si-rich phases in the scale.

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A new approach to improve high temperature corrosion resistance of thermally sprayed coatings by using electrochemical corrosion tests

Materials and Corrosion ◽

10.1002/maco.201005860 ◽

2010 ◽

Vol 62 (7) ◽

pp. 623-634 ◽

Cited By ~ 2

Author(s):

T. Neddemeyer ◽

M. Mocker ◽

M. Faulstich

Keyword(s):

Corrosion Resistance ◽

High Temperature ◽

Electrochemical Corrosion ◽

High Temperature Corrosion ◽

New Approach ◽

Corrosion Tests ◽

Thermally Sprayed Coatings ◽

Thermally Sprayed ◽

Sprayed Coatings

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Microstructural and Corrosion Behavior of High Velocity Arc Sprayed FeCrAl/Al Composite Coating on Q235 Steel Substrate

Coatings ◽

10.3390/coatings9090542 ◽

2019 ◽

Vol 9 (9) ◽

pp. 542 ◽

Cited By ~ 2

Author(s):

Ndumia Joseph Ndiithi ◽

Min Kang ◽

Jiping Zhu ◽

Jinran Lin ◽

Samuel Mbugua Nyambura ◽

...

Keyword(s):

Corrosion Resistance ◽

Composite Coating ◽

High Velocity ◽

Steel Substrate ◽

Arc Spraying ◽

Spray Parameters ◽

Q235 Steel ◽

Electrochemical Tests ◽

Al Composite ◽

Al Coating

High velocity arc spraying was used to prepare FeCrAl/Al composite coating on Q235 steel substrate by simultaneously spraying FeCrAl wire as the anode and Al wire as the cathode. The composite coating was sprayed with varying voltage and current to obtain optimum coating characteristics. FeCrAl coating was also prepared for comparison purposes. The surface microstructure of the coatings was characterized by scanning electron microscope (SEM) and X-ray diffraction (XRD). The average microhardness of the coatings and the substrate was analyzed and compared. Corrosion resistance was investigated by means of electrochemical tests. The image results showed that a lamellar structure consisted of interwoven layers of FeCrAl and Al. Al and FeCr constituted the main phases with traces of oxides and AlFe intermetallic compounds. The average porosity was reduced and microhardness of the coatings was improved with increasing voltage and current. The FeCrAl/Al coating formed alternating layers of hard and ductile phases; the corrosion resistance of the coatings in the sodium chloride (NaCl) solution depended on the increase in Al content and spray parameters. The corrosion resistance tests indicated that FeCrAl/Al coating had a better corrosion resistance than the FeCrAl coating. FeCrAl/Al can be used to coat steel substrates and increase their corrosion resistance.

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