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surface contaminants

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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
...Abstract Abstract Superalloys are susceptible to damage from a variety of surface contaminants. They may also require special surface finishes for subsequent processing steps such as coating applications. This chapter describes some of the cleaning and finishing procedures that have been...
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 other contaminants that form or are otherwise deposited on the surface of titanium during processing operations such as hot working and heat treatment. This chapter explains what makes titanium susceptible to the formation of scale and how it can be removed via belt grinding, abrasive blasting...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280149
EISBN: 978-1-62708-267-9
... decisions. It discusses the basic concepts of fusion welding and the differences between solid-solution-hardened and precipitation-hardened wrought superalloys. It addresses joint integrity, design, weld-related cracking, and the effect of grain size, precipitates, and contaminants. It covers common fusion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120065
EISBN: 978-1-62708-269-3
... defects, and the need for contaminant-free surfaces and atmospheres. It describes common forms of fusion, arc, and solid-state welding along with the use of filler metals, shielding gases, and stress-relief treatments. It also discusses the practice of titanium brazing and the role of filler metals...
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
... to achieve the desired objectives of quenching, annealing, and aging along with the associated risks of surface damage caused by oxidation, carbon pickup, alloy depletion, intergranular attack, and environmental contaminants. It also discusses heat treatment atmospheres, furnace and fixturing requirements...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780177
EISBN: 978-1-62708-281-5
... account of various factors pertinent to the characterization of materials and analysis of optical components, namely transmission, haze, yellowness, refractive index, surface irregularity, birefringence, internal contamination, surface gloss, and color. In addition, details on ad hoc tests used...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050173
EISBN: 978-1-62708-311-9
... contaminants and defects associated with various quenchants and processing atmospheres and provides insights on how they can be removed and, in some cases, prevented. It also recommends the application of a rust preventative shortly after parts have cooled. Cleaning Surface Finish Rust Protection...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230513
EISBN: 978-1-62708-298-3
... and personnel protective equipment (PPE) Personal air monitor Worker entry log Beryllium-controlled area Surface contamination at or above 0.2 μg/100 cm 2 and/or reasonably expected to have airborne greater than or equal to 0.1 μg/m 3 but less than 0.2 μg/m 3 in an 8 h TWA Work control...
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
... of Timet Fig. 9.12 Sejournet glass-lubricated extrusion process. Billet surface preparation and heating are important in contributing to extruded surface quality. Fig. 9.11 Continuous vacuum annealing is used to process thin strip free from surface contamination. Courtesy of Timet...
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
... of the forging is minimal, mainly involving the removal of surface contaminants that would prevent magnetization or inhibit particle mobility Routine inspection work can be effectively done by relatively unskilled labor properly trained in interpretation For forgings that are simple in configuration...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820115
EISBN: 978-1-62708-339-3
... becomes excessive above 760 °C (1400 °F) in intermittent service. Improved surface finish over that of S41600 S42000 S42000 attains its full corrosion resistance in the hardened and polished condition. Much lower resistance is shown by annealed material and material having its surface contaminated...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230499
EISBN: 978-1-62708-298-3
.... The inhalation levels correspond to those measured at Brush Wellman (Elmore, OH). Detailed assumptions incorporated into the calculations are presented in the publication by Deubner et al. [2001] . Inhalation following resuspension of beryllium-containing particulates from contaminated surfaces would contribute...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030112
EISBN: 978-1-62708-282-2
... occurs. It should be noted that these conclusions are based on the assumption that oxygen is distributed relatively uniformly throughout the cross section in all parts of the weldment. A locally high concentration, such as a high surface contamination of oxygen or nitrogen, could result in a severe loss...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780131
EISBN: 978-1-62708-268-6
... with each mating surface can induce a leak. One such cause is any imperfection on either mating surface, such as a scratch, gouge, or surface finish that is too rough. Contaminants caught between the gasket and the mating surfaces can allow a leak path. Sometimes, gaskets are used with sealants...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550193
EISBN: 978-1-62708-307-2
... to 0.005 in.) in depth to minimize surface damage. Although most machining operations are performed without coolant to avoid chip contamination, the use of coolant can reduce the depth of damage and give longer tool life. The drilling of sheet can lead to delamination and breakout unless the drill head...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030209
EISBN: 978-1-62708-282-2
... pipelines and storage tanks. Fuel pipelines and storage tanks can exhibit light corrosion due to water condensation on the surface of the metal and to oxygen ingress. Red-orange rust particles dislodged from the metal surface contaminate the fuel and lead to filter plugging. Filming inhibitors...
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
... is a very commonly used surface treatment to remove surface contamination, notably iron, and to form a passive film. The film forms of its own accord when a clean surface encounters moist air, but film formation can be accelerated by controlling the environment. The surface to be passivated should first...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870235
EISBN: 978-1-62708-314-0
.... The abrasion increases the surface area of the surfaces to be bonded and may remove residual contamination, as well as removing fractured resin left behind from the peel ply. However, the abrading operation should be conducted with care to avoid exposing or rupturing the reinforcing fibers near the surface...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110587
EISBN: 978-1-62708-247-1
...] , such as preventing or removing contaminants, etc. With the demand for lower and lower ESR, from hundreds to tens and even to single digit milliohms, ESR failures analysis are becoming crucial. Most of these low ESR surface mount Ta-CAPS are conductive polymer-based and are not hermetically sealed, hence...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480265
EISBN: 978-1-62708-318-8
... include: The preparation of clean, scale-free surfaces is as important in brazing operations as it is in welding. Cleaning operations are necessary to remove surface scale, oil, and other foreign matter that contaminate titanium and prevent braze metal wetting. Cleaning procedures discussed...