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chemical descaling

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Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001312
EISBN: 978-1-62708-170-2
... treatment processes, surface soil removal, blast cleaning, chemical descaling, pickling or etching, anodizing, autoclaving, polishing, buffing, vapor phase nitriding, and electroplating. Applications of these surface treatment processes are also reviewed. Selected References Selected References...
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005777
EISBN: 978-1-62708-165-8
... or flame jet cleaning, abrasive blasting, and tumbling. Solvent cleaning, emulsion cleaning, alkaline cleaning, acid cleaning, pickling, and descaling are chemical cleaning methods. The electrochemical cleaning methods include electropolishing, electrolytic alkaline cleaning, and electrolytic pickling...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001307
EISBN: 978-1-62708-170-2
... present, the pH of the scale-conditioning solution, and the physical and chemical composition of the scale. Typical multicycle descaling operations, including scale conditioning, are defined in Tables 1 and 2 . HEAT-RESISTANT ALLOYS (solid-solution-strengthened or precipitation-hardened nickel...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003221
EISBN: 978-1-62708-199-3
.... It describes various techniques to improve functional surface properties and enhance the appearance of product forms. The article discusses various cleaning and finishing techniques such as abrasive blast cleaning, polishing and buffing, barrel burnishing, chemical cleaning, pickling, etching and bright...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001221
EISBN: 978-1-62708-170-2
... acid solution CrO 3 360–480 g/L (3–4 lb/gal), HNO 3 5% total volume All Aluminum Immersion Nitric acid solution 50–78% HNO 3 34 ± 6 110 ± 10 Maximum allowable immersion time, 20 min Note: Heavy metals plus stripping chemicals require appropriate means of disposal to meet EPA...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003220
EISBN: 978-1-62708-199-3
... performance of stainless steel. This article describes the surface treatment of stainless steels including abrasive blast cleaning, acid pickling, salt bath descaling, passivation treatments, electropolishing, and the necessary coating processes involved. It also describes the surface treatment of heat...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003220
EISBN: 978-1-62708-199-3
... of stainless steel. This article describes the surface treatment of stainless steels including abrasive blast cleaning, acid pickling, salt bath descaling, passivation treatments, electropolishing, and the necessary coating processes involved. It also describes the surface treatment of heat-resistant alloys...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001311
EISBN: 978-1-62708-170-2
... Absorption Galvanic Effects and Discontinuities Metallurgical Restrictions on Descaling Variety of Scale Protective Coatings Nonmetallic Elements Metallic Elements Chemical Conversion Coatings Plating Physical Vapor Deposition Sprayed Coatings Other Coatings Contemporary...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006423
EISBN: 978-1-62708-192-4
.... and Olsson M. , Tribological testing of some potential PVD and CVD coatings for steel wire drawing dies , Wear , Vol 273 , 2011 , p 55 – 59 10.1016/j.wear.2011.06.020 79. Gillström P. and Magnus J. , Mechanical descaling of wire rod using reverse bending and brushing , J. Matls...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001305
EISBN: 978-1-62708-170-2
...Abstract Abstract Passivation; pickling, that is, acid descaling; electropolishing; and mechanical cleaning are important surface treatments for the successful performance of stainless steel used for piping, pressure vessels, tanks, and machined parts in a wide variety of applications...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001229
EISBN: 978-1-62708-170-2
.... Pickling is the most common of several processes used to remove the scale from steel surfaces. The term pickling refers to the chemical removal of scale by immersion in an aqueous acid solution. The process originated in the late 1700s, when sheets of steel were descaled by immersion in vats of vinegar...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001440
EISBN: 978-1-62708-173-3
... surfaces should be free of dirt, fingerprints, grease, and residues before stress relieving. Contaminated surface metal must be removed from the entire weldment by machining or descaling and pickling to remove 0.025 to 0.050 mm (0.001 to 0.002 in.) per surface. Repair welds should follow...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003221
EISBN: 978-1-62708-199-3
... according to the manufacturer's instructions. Salt bath descaling is done by a series of cycles through (a) the salt, (b) a water rinse, and (c) a sulfuric acid bath to remove scale before final pickling. Metal removal by a chemical bath of nitric-hydrofluoric acid is used most commonly, although other...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003213
EISBN: 978-1-62708-199-3
... water rinse. A properly cleaned metal surface optimizes the performance of a coating that is subsequently applied by conversion coating, electroplating, painting, or other operations. The main chemical methods of soil removal by an alkaline cleaner are saponification, displacement, emulsification...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003213
EISBN: 978-1-62708-199-3
...: Plain or sulfurized mineral and fatty oils (or combination of the two), chlorinated mineral oils, and sulfurized chlorinated mineral oils Conventional or heavy-duty soluble oils with sulfur or other compounds added and soluble grinding oils with wetting agents Chemical cutting fluids, which...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004203
EISBN: 978-1-62708-184-9
... and application of materials in this industry, and current issues relative to pharmaceutical equipment construction, warrant closer examination. Materials Passivation Electropolishing Rouging References References 1. “Standard Practice for Cleaning, Descaling, and Passivation of Stainless...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005417
EISBN: 978-1-62708-196-2
.../026708303225003072 109. Krzyzanowski M. and Beynon J.H. , Effect of Oxide Scale Failure in Hot Steel Rolling on Subsequent Hydraulic Descaling: Numerical Simulation , Third Int. Conf. Hydraulic Descaling, Proceedings , Sept 14–15, 2000 (London, U.K.), IO. Communications Ltd., 2000 , p 77 – 86...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001256
EISBN: 978-1-62708-170-2
... and adjust. Plating current density too low Check and adjust current setting. Poor cleaning or inadequate activation Check parts going out of descale/activator. Adjust to proper operating conditions if necessary. Poor throwing power or plating distribution Metal content too high Analyze...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004103
EISBN: 978-1-62708-184-9
... 1×10 −3 1×10 −4 1×10 −5 Accuracy, % 30 30 10 Identify organics No Some No Identify chemical state Some Yes No Comparison of type 316L chromium/iron ratios using various polishing and passivation techniques Table 7 Comparison of type 316L chromium/iron ratios using...
Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.a0001014
EISBN: 978-1-62708-161-0
... is decarburization. Hot-rolled steel bars and shapes can be produced to chemical composition ranges or limits, mechanical property requirements, or both. Hot-rolled carbon steel bars are produced to two primary quality levels: merchant quality and special quality. Merchant quality is the least restrictive descriptor...