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duplex coatings

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Published: 01 January 2006
Fig. 29 Duplex coating consisting of an overlay coating (O) with an aluminide layer (A) on top. There is an interdiffusion zone with the base metal (B) and another interdiffusion zone between A and O. Lactic acid etch. See the article “Corrosion of Industrial Gas Turbines” in this Volume. More
Image
Published: 01 January 2006
Fig. 11 Duplex coating consisting of an overlay coating (O) with an aluminide layer (A) on top. The interdiffusion zone with the base metal (B) is indicated by the letter I. There is another interdiffusion zone between A and O. Lactic acid etch More
Image
Published: 01 June 2016
Fig. 13 (a) Ductility and (b) weight gain of various coatings on Ti-6Al-2Sn-4Z4-2Mo substrate at 980 K (707 °C, or 1304 °F) for 25 h. The AlSiO 2 duplex coating exhibits the highest ductility, lowest total weight gain, and lowest solid-solution pickup of all coatings tested. CVD, chemical More
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003833
EISBN: 978-1-62708-183-2
... information on duplex coatings and the applications of chromium electrodeposits. chromium plating corrosion corrosion resistance duplex coatings electroplating chromium electrodeposits posttreatment HARD CHROMIUM plated parts have chromium coatings more than approximately 1.2 μm (0.05 mil...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004158
EISBN: 978-1-62708-184-9
.... The microstructure of an overlay coating is shown by the middle portion of the coating in Fig. 11 . It consists of intermetallic compounds in a matrix. These compounds are aluminides—NiAl, Ni 3 Al, or CoAl. The matrix consists of nickel, cobalt, chromium, and yttrium. Fig. 11 Duplex coating consisting...
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Published: 01 January 2003
Fig. 5 Corrosion pit formation in a substrate beneath a void in a duplex noble metal coating. The top coating layer (M 1 ) is cathodic to the coating underlayer (M 2 ), which is in turn cathodic to the substrate (M 3 ). As in Fig. 4 , the coating tends to collapse into the pit. Source: Ref 2 More
Image
Published: 01 January 2003
Fig. 14 (a) Plan view scanning electron micrograph of hydrotalcite coating. (b) Cross-sectional scanning transmission electron micrograph of hydrotalcite illustrating the duplex nature of the film. (c) SIMS depth profile of a hydrotalcite coating More
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004204
EISBN: 978-1-62708-184-9
... are more workable and have better weldability than high-alloy ferritic steels. When the superaustenitics are specified, the welding specifications of alloy producers should be followed explicitly so that the full chemical and cracking resistance of the alloy is maintained. Duplex Stainless Steels...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001411
EISBN: 978-1-62708-173-3
... Abstract This article provides information on the base material properties of wrought duplex stainless steels (DSS). These properties include microstructure, alloy grades, mechanical and physical properties, and corrosion resistance. The article reviews the applications and microstructural...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006372
EISBN: 978-1-62708-192-4
... steels have been classified by microstructure and are categorized as austenitic, martensitic, ferritic, or duplex. The main categories of wear are related to abrasion, erosion, adhesive wear, and surface fatigue. The article presents a list that proposes the alloy family that could be the optimal...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001471
EISBN: 978-1-62708-173-3
... an acceptable thermal expansion match to the cast iron. Because cast iron is anodic to the high-nickel weld deposit, corrosive attack occurs in the cast iron adjacent to the weld deposit. It is suggested that cast iron welds made with high-nickel deposits be coated (painted) to reduce the susceptibility...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004190
EISBN: 978-1-62708-184-9
... to the presence of organic acids in the flash tank environment. Thermal spray coating or lining with type 304L stainless steel has extended the life of corroding flash tanks. Replacement of flash tanks with solid duplex alloy 2205 is a solution to the corrosion problem. The blow tank for batch digesters...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001313
EISBN: 978-1-62708-170-2
... promising of the metallic coatings for molybdenum. It offers excellent oxidation protection and is compatible with substrate; however, chromium is embrittled by nitrogen and will crack and spall on repeated thermal cycling. A nickel or nickel alloy overlay will protect chromium from nitriding. A duplex...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001434
EISBN: 978-1-62708-173-3
... of five major families of stainless steels: martensitic stainless steels, ferritic stainless steels, austenitic stainless steels, precipitation-hardening (PH) stainless steels, and duplex ferritic-austenitic stainless steels. Stainless steels of all types are weldable by virtually all welding processes...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006283
EISBN: 978-1-62708-169-6
... for α/β titanium alloys are summarized in Table 2 ( Ref 2 , 3 , 4 ). Typical heat treatments for α-β titanium alloys Table 2 Typical heat treatments for α-β titanium alloys Heat treatment Heat treatment cycle Microstructure Duplex anneal Solution treat at 50–75 °C (90–135 °F...
Series: ASM Handbook
Volume: 5A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v05a.a0005743
EISBN: 978-1-62708-171-9
... Abstract Thermal spray coatings, along with certain proprietary sealants, are widely used in the paper manufacturing industry for corrosion and wear resistance and to impart special surface characteristics. This article discusses the steps involved in the paper manufacturing process. Most...
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006014
EISBN: 978-1-62708-172-6
... is applied to galvanizing, it often is referred to as a duplex system. The service life of a duplex coating system has been reported in studies to be a factor of 1.5 to 2.3 times the sum of the individual service lives for bare galvanizing or painting alone ( Ref 1 ). However, the actual increase in service...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003164
EISBN: 978-1-62708-199-3
... environments (good aqueous corrosion resistance) Tooling (high-temperature strength and wear resistance developed through preoxidation) Permanent molds (the ability to develop a thermal barrier coating by high-temperature oxidation) NiAl Aluminides Nickel-aluminum containing more than...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004153
EISBN: 978-1-62708-184-9
... to minimize corrosion problems in FGD systems, but initial cost is often a determining factor. For example, flake-glass-filled organic coatings and linings on carbon steel have been used for absorbers and ductwork because of low initial costs. However, inadequate surface preparation and improper application...
Book Chapter

Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004221
EISBN: 978-1-62708-184-9
... of an aeroderivative gas turbine blade by hot corrosion. See the article “Corrosion of Industrial Gas Turbines” in this Volume. Fig. 29 Duplex coating consisting of an overlay coating (O) with an aluminide layer (A) on top. There is an interdiffusion zone with the base metal (B) and another interdiffusion...