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aluminized steel
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Image
Published: 01 January 2005
Image
Published: 01 January 2005
Image
in Metallography and Microstructures of Low-Carbon and Coated Steels
> Metallography and Microstructures
Published: 01 December 2004
Fig. 52 Microstructure of aluminized low-carbon steel. (a) Type 1 aluminized (aluminum with 9% Si). (b) Type 2 aluminized steel. Both coatings have the alloy layer (iron aluminide intermetallic layer), and silicon particles can be seen in type 1 aluminized. 2% nital etch. 1000×
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Book Chapter
Book: Surface Engineering
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001293
EISBN: 978-1-62708-170-2
.... The article presents information on the coating formation mechanism of superalloys and explains the steps involved in a typical pack cementation process. It concludes with information on the processing procedures and properties of pack aluminized steels. aircraft engines coating formation diffusion...
Abstract
This article describes the widespread use of diffusion coatings for elevated-temperature protection of the turbine components for aircraft engines and gas turbines. The principles of pack diffusion coating, namely, aluminizing, chromizing, and siliconizing, are discussed. The article presents information on the coating formation mechanism of superalloys and explains the steps involved in a typical pack cementation process. It concludes with information on the processing procedures and properties of pack aluminized steels.
Book: Corrosion: Materials
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003808
EISBN: 978-1-62708-183-2
... the Sendzimir process and the Cook-Norteman process, which are the two commercial processes that are used for almost all hot-dip galvanized sheet steel in the United States. The article provides a discussion on the aqueous corrosion and atmospheric corrosion of galvanized steel and aluminized steel, as well...
Abstract
From the standpoint of corrosion protection of iron and steel, metallic coatings can be classified into two types: noble coatings and sacrificial coatings. This article focuses on hotdipped zinc, aluminum, zinc-aluminum alloy and aluminum-zinc alloy coatings. It discusses the Sendzimir process and the Cook-Norteman process, which are the two commercial processes that are used for almost all hot-dip galvanized sheet steel in the United States. The article provides a discussion on the aqueous corrosion and atmospheric corrosion of galvanized steel and aluminized steel, as well as the intergranular corrosion of galvanized steel.
Image
Published: 01 January 2003
Fig. 10 Microstructure of the coating and alloy layer of a hot-dip coated type 1 aluminized steel sheet
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Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003688
EISBN: 978-1-62708-182-5
... coatings, 55Al-Zn coating, 95Zn-Al coating, and aluminized coatings. continuous hot dip coating galvanized coating galvannealed coating aluminized coating HOT-DIP COATING is a process that primarily refers to the application of a low melting point metal as a coating on steel wherein...
Abstract
This article describes the basic principles, processing steps, and benefits of continuous hot dip coatings. It provides useful information on the principal types of coatings applied in the hot-dip process. The types of coatings include galvanized coatings, galvannealed coatings, 55Al-Zn coating, 95Zn-Al coating, and aluminized coatings.
Image
in Problems Associated with Heat Treated Parts
> Analysis and Prevention of Component and Equipment Failures
Published: 30 August 2021
Fig. 9 Austenite grain growth in a fine-grained 0.5% C hypoeutectoid steel (aluminum deoxidized). 0.43C-0.23Si-0.75Mn (wt%). (a) Austenitized for 1 h at 850 °C, cooled at 300 °C/h. Austenite grain size: ASTM No. 7, 180 HV. Picral. 100x. (b) Austenitized for 1 h at 900°C, cooled at 300 °C/h
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Book Chapter
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005775
EISBN: 978-1-62708-165-8
... applications of pack cementation aluminizing, which is used to improve the performance of steels in high-temperature corrosive environments. aluminizing chromizing pack cementation siliconizing PACK CEMENTATION is the most widely employed method of diffusion coating. In general, diffusion...
Abstract
Pack cementation is the most widely employed method of diffusion coating. This article briefly reviews pack cementation processes of aluminizing, chromizing, and siliconizing. It contains tables that list typical characteristics of pack cementation processes and commercial applications of pack cementation aluminizing, which is used to improve the performance of steels in high-temperature corrosive environments.
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004107
EISBN: 978-1-62708-184-9
..., or aluminized coatings, are also used for the corrosion protection of steel in marine environments. An extensive comparative study was conducted on the atmospheric corrosion behavior of aluminized and galvanized steels ( Ref 24 , 25 ). Table 2 shows predicted 10 year weight losses of both of these coatings...
Abstract
A sacrificial coating applied to a steel substrate can add 20 years or more of life to the substrate, depending on its thickness and composition. Different techniques to apply sacrificial coatings offer various characteristics that contribute to corrosion resistance. This article discusses thermal spray, hotdipping, and electroplating processes used to apply coatings in steel structures. It describes the corrosion attributes of the resulting coatings and discusses the methods of protecting steel from corrosion using aluminum and zinc coatings.
Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.a0001012
EISBN: 978-1-62708-161-0
... “Continuous Hot Dip Coatings” in Corrosion: Fundamentals, Testing, and Protection, Volume 13A of ASM Handbook. Typical mechanical properties of hot dip galvanized, long terne, or aluminized steel sheet Table 9 Typical mechanical properties of hot dip galvanized, long terne, or aluminized steel...
Abstract
Steel sheet is often coated in coil form prior to fabrication to save time, reduce production costs, and streamline operations. This article examines the most common precoating methods and provides a metallurgical understanding of how they impact the manufacturability, performance, and service life of the host material. The article covers metallic coatings, including zinc, aluminum, zinc-aluminum alloys, tin, and terne; pretreatment or phosphate coatings; and preprimed and painted finishes based on organic coatings.
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005164
EISBN: 978-1-62708-186-3
... higher resistance to powdering and flaking in the electroplated coating as compared to the furnace-alloyed coating ( Ref 10 ). Aluminum-Coated Steels Hot dip aluminum-coated steels (aluminized steels) are used in applications requiring greater salt spray or atmospheric corrosion protection than...
Abstract
This article provides an overview of some common sheet steel coatings available. It discusses the formability differences between coated and bare steel and provides some general guidelines on the forming of coated steels. Coated steels are classified according to the nature of the substrate, the type of coating, and the method used for its application. The article describes various coating types for steels such as zinc-coated steels, aluminum-coated steels, tin-coated steels, terne-coated steels, and organic-coated steels.
Book Chapter
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003218
EISBN: 978-1-62708-199-3
... temperature. Aluminizing An aluminizing pack cementation process is commercially practiced for a range of alloys, including nickel- and cobalt-base superalloys, steels, and stainless steels. Simple aluminide coatings resist high-temperature oxidation by the formation of an alumina protective layer...
Abstract
Chemical vapor deposition (CVD) involves the formation of a coating by the reaction of the coating substance with the substrate. Serving as an introduction to CVD, the article provides information on metals, ceramics, and diamond films formed by the CVD process. It further discusses the characteristics of different pack cementation processes, including aluminizing, siliconizing, chromizing, boronizing, and multicomponent coating.
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003686
EISBN: 978-1-62708-182-5
... 59 ) have studied the deposition of aluminide and silicide coatings on γ-TiAl. Simultaneous Aluminizing-Siliconizing A pack cementation process for the codeposition of aluminum and silicon onto a low carbon steel has been developed ( Ref 60 ). The pack contains aluminum and SiO 2 powders...
Abstract
This article focuses on the pack-cementation coatings, in particular, halide-activated pack cementation coatings on nickel alloys. It also describes the thermodynamics and kinetics of, and simultaneous deposition of various types of, pack cementation processes. These include pack aluminizing, chromizing, and siliconizing.
Image
Published: 01 December 2004
Fig. 14 Low-carbon steel showing inclusions of calcium sulfide outer rim (light gray) and calcium aluminate core (dark gray). The matrix is pearlite and ferrite. As-polished. 500×. Courtesy of B.L. Bramfitt and J.R. Kilpatrick
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Image
Published: 01 January 2005
rigorously controlled. More corrosion-and heat-resistant steels are used to combat the changing systems that include catalytic converters. Aluminized and stainless steels find application in automotive exhaust systems. Corrosion form and mechanism Dewpoint corrosion Material Ferrous, carbon steel
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Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003761
EISBN: 978-1-62708-177-1
...-carbon steel. In some cases, an aluminum coating called aluminized is applied to protect low-carbon steel sheet for applications where moderate heat resistance is required. Such applications include automotive exhaust systems (tailpipes, mufflers, etc.). The appliance industry coats ultralow-carbon...
Abstract
This article reviews various phases and constituents found in the microstructures of low-carbon and coated steels. It provides information on the criteria for selecting proper metallographic procedures. Techniques used to prepare metallographic specimens of low-carbon steels and coated steels, such as sectioning, mounting, grinding, polishing, and etching, are discussed. The article also reviews the simple and proven manual sample preparation techniques of coated steel specimens.
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004121
EISBN: 978-1-62708-184-9
..., such as within the confines of a WWTP, the same components should be aluminized steel, type 304 stainless steel, or type 201 stainless steel. The highest structural loading on poles and guardrails occurs near the base of the structure where the maximum bending moment is located. Thus, corrosion on structural...
Abstract
The major benefit of the implementation of the corrosion-control technologies at Army installations is the extension of the service life of buildings and other structures. This article reviews the exposure of military facilities and equipment to a wide variety of environmental conditions, including soils, waters, or atmospheres of varying corrosivity. It presents the case studies illustrating typical examples of the types of corrosion problems found on military installations. The article describes the various corrosion-control technologies used in military facilities. These include protective coatings and linings, cathodic protection, advanced materials selection and design, water treatment, equipment inspection and monitoring, and below-grade moisture mitigation.
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002466
EISBN: 978-1-62708-194-8
... ). The aluminum outerlayer offers excellent corrosion resistance because of the good barrier properties provided by the increased thickness of the coating ( Fig. 2 ). Coating thickness losses for galvanized steel and type 2 aluminized steel in atmospheric exposure Table 2 Coating thickness losses...
Abstract
Surface treatments are used in a variety of ways to improve the material properties of a component. This article provides information on surface treatments that improve service performance so that the design engineer may consider surface-engineered components as an alternative to more costly materials. It describes solidification surface treatments such as hot dip coatings, weld overlays, and thermal spray coatings. The article discusses deposition surface treatments such as electrochemical plating, chemical vapor deposition, and physical vapor deposition processes. It explains surface hardening and diffusion coatings such as carburizing, nitriding, and carbonitriding. The article also tabulates typical characteristics of carburizing, nitriding, and carbonitriding diffusion treatments.
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004163
EISBN: 978-1-62708-184-9
... the days of aluminized carbon steel mufflers, often with bare carbon steel connecting and internal tubes, today's (2006) exhaust system is a high-technology sound-deadening, pollution-removing system with one or more catalytic converters, mufflers, resonators, and flexible joints, all constructed...
Abstract
Steel automotive exhaust systems suffer from various forms of corrosion. This article illustrates exhaust system components with typical upper metal skin temperatures and alloys of construction. It discusses high-temperature corrosion of automotive exhaust systems, including oxidation, hot salt attack, and thermal fatigue. The article describes the various forms of corrosion which occur at the cold end of an exhaust system. The forms of cold end exhaust corrosion, including condensate pitting corrosion, exterior salt pitting, crevice corrosion, intergranular corrosion, and galvanic corrosion.