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chemical descaling

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Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120085
EISBN: 978-1-62708-269-3
..., and molten salt descaling baths. It also discusses the role of acid pickling, barrel finishing, polishing, and buffing as well as the use of chemical conversion coatings and protective platings. Wet Blasting Dry Blasting Gas Absorption Galvanic Effects and Discontinuities Metallurgical...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480207
EISBN: 978-1-62708-318-8
... microstructural refinement and the best combination of strength and ductility. After rolling, smaller rod sizes (6.4 to 9.5 mm, or 0.25 to 0.38 in.) are chemically descaled in hot caustic baths and pickled in an aqueous mixture of nitric and hydrofluoric acids (10 to 35% HNO 3 and 1.5 to 5% HF). If straight...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280203
EISBN: 978-1-62708-267-9
... Bath Descaling Background Surface Finishes by Chemical (Electrochemical) Means Surface Finishes by Mechanical Means Comments Cleaning is required to remove contaminants from the surfaces of parts made of superalloys. Shop soils such as oil, grease, and cutting fluids can be removed...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480243
EISBN: 978-1-62708-318-8
..., heat treated, and welded. Titanium alloys could become susceptible to stress corrosion after such exposures. Dark oxides that form on titanium above 540 °C (1000 °F) are removed by mechanical and chemical methods. Mechanical descaling methods include grit and vapor blasting, tumbling, and other...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910427
EISBN: 978-1-62708-250-1
... with a rubber stopper or stiff-bristle brush, chemical descaling, and electrochemical descaling. The recommended descaling solutions for each material and alloy system are identified in the corrosion testing standards (e.g., ASTM G 1). Inhibited hydrochloric acid for example, is recommended for the removal...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080005
EISBN: 978-1-62708-304-1
...Abstract Abstract Many metallic components, such as retorts in heat treat furnaces, furnace heater tubes and coils in chemical and petrochemical plants, waterwalls and reheater tubes in boilers, and combustors and transition ducts in gas turbines, are subject to oxidation. This chapter explains...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.ssde.t52310193
EISBN: 978-1-62708-286-0
... Stainless steels can be brightened by chemical or electrolytic action, which selectively dissolves the surface in such a way that it becomes microscopically smoother. Electropolishing is the most effective means of accomplishing this. It causes the surface roughness to decrease by approximately one-half...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.9781627082501
EISBN: 978-1-62708-250-1
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080321
EISBN: 978-1-62708-304-1
... be reduced to about 500 °C (930 °F) when the ratio became less than 3 to 4. This is illustrated in Fig. 11.3 ( Ref 8 ). The analysis of the chemical compositions (wt%) of the deposits that formed on the superheater tubes when the boiler was fired with fuel oils with various ratios of (Na+S)/V showed...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2007
DOI: 10.31399/asm.tb.pmsspmp.t52000023
EISBN: 978-1-62708-312-6
... Federation (MPIF) , Princeton, NJ . Unpublished data 3.1.1 Brief Process Description 3.1.2 Physical Powder Characteristics 3.1.3 Chemical Powder Characteristics 3.1.4 Raw Materials and Melting 3.1.5 Atomization Compacting-Grade Powders High-Pressure Water Atomization Particle Size...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550223
EISBN: 978-1-62708-307-2
... structures and other high-performance applications. The excellent corrosion resistance and biocompatibility coupled with good strength make titanium and its alloys useful in chemical and petrochemical applications, marine environments, and biomaterial applications. The primary reasons for using titanium...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280135
EISBN: 978-1-62708-267-9
... for a subsequent processing step (ingot cogging, component forging, etc.). In addition, some chemical processing, such as coating, requires that heat and resultant high temperatures be applied to cause the chemical changes to occur. In order to effect microstructural changes in alloys, heat invariably is required...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080147
EISBN: 978-1-62708-304-1
... , Moritz B.J. and Pollock W.I. , Ed., NACE , 1986 , p 45 27. MTI Publication MS-3 , Materials Selector for Hazardous Chemicals , Vol 3 , Hydrochloric Acid, Hydrogen Chloride and Chlorine , Materials Technology Institute of the Chemical Process Industries, Inc. , Dillon C.P...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280287
EISBN: 978-1-62708-267-9
...-property testing extrapolation with time and temperature has been reasonably successful, many engineers assume that a chemical property can be extrapolated as well. The assumption is made that the very high-temperature results can be extrapolated to the lower temperatures. Often, that may not be true...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720365
EISBN: 978-1-62708-305-8
... to the forging operation. Some, but again by no means all, of the service problems that occur with forgings can be traced to imperfections originating in the ingot. Chemical Segregation Ingot Pipe and Centerline Shrinkage High Hydrogen Content Nonmetallic Inclusions Unmelted Electrodes and Shelf...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120295
EISBN: 978-1-62708-269-3
... descaling, and fabrication General Titanium Inc./BIAM 9645 Telstar Ave. El Monte, CA 91731 Tel: 888-606-2426 Fax: 626-575-6558 Manufacturer of titanium castings for aerospace and industrial; precision titanium forgings for aircraft, orthopedics, and industrial; titanium-gold coatings for hardware...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2013
DOI: 10.31399/asm.tb.mfub.t53740001
EISBN: 978-1-62708-308-9
... Diagrams , American Society for Metals , 1967 The first step in making steel from iron ore is to make iron by chemically reducing the ore (iron oxide) with carbon, in the form of coke, according to the general equation: (Eq 1) Fe 2 O 3 + 3 CO → 2 Fe + 3 CO 2...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910363
EISBN: 978-1-62708-250-1
... boiler tubes Carbon steel Economizer and air preheater tubes 2 1 4 % Cr-1% Mo steel Superheater tubes 2 1 4 % Cr-1% Mo steel Flue gas scrubbers NO x /SO x removal units 304 stainless steel Chemical processing Reactor vessels and tubing 304/316 stainless steel...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.9781627082822
EISBN: 978-1-62708-282-2
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120065
EISBN: 978-1-62708-269-3
...Chemical compositions of titanium and titanium alloy filler metals Table 9.1 Chemical compositions of titanium and titanium alloy filler metals AWS classification Composition,% C O H N Al V Sn Cr Fe Mo Nb Ta Pd Ti ERTi-1 (a) 0.03 0.10 0.005 0.012...