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chemical cleaning

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430351
EISBN: 978-1-62708-253-2
... defects, forming and welding defects, design defects, improper cleaning methods, and ineffective maintenance. It also includes case studies and illustrations. boiler tubes chemical cleaning design defects forming defects material defects quality control welding defects Failures Attributed...
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Published: 01 April 2004
occurs more rapidly because of denudation of the oxide scale, but the pass condition, which is a wetting force of –4.5 mN achieved within 2.1 s of immersion, is not achieved in this case. (c) Following chemical cleaning. The component solderability now satisfies the acceptance criterion. More
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
... in cleaning titanium components. Oil, fingerprints, grease, paint, and other foreign matter should be removed from all surfaces. Cleaning is required because the chemical reactivity of titanium at elevated temperatures can lead to its contamination or embrittlement and can increase its susceptibility...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270113
EISBN: 978-1-62708-301-0
... Abstract An aircraft went down over water some 30 minutes into a flight. The wreckage was retrieved and the elevator linkage components were dismantled, cleaned, and reassembled. As the chapter explains, both the port and starboard hinge pins had fractured at a tack welded joint along a flange...
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
... by about 50%. Careful consideration needs to be given to the mechanical aspects of contamination removal. Chemical removal means are no less of a concern, because some contaminants interact with cleaning chemicals to produce intergranular attack. This type of attack creates not only an undesirable...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2013
DOI: 10.31399/asm.tb.mfub.t53740325
EISBN: 978-1-62708-308-9
... of industrial cleaning and may employ both physical and chemical actions. Solid particles on the surface are generally assumed to be electrically attracted to the surface. During the cleaning process, these particles are surrounded by wetting agents that neutralize the electrical charge and allow them...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 January 2023
DOI: 10.31399/asm.tb.itfdtktmse.t56060001
EISBN: 978-1-62708-440-6
... to be PVD coated must be chemically clean to ensure good adhesion. For larger substrates, this may involve grit blasting followed by degreasing. For more sophisticated applications, such as semiconductors, more advanced techniques are necessary. Theory and Operation The coating coverage derived from...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930353
EISBN: 978-1-62708-359-1
... for unalloyed tantalum. However, some of the alloys do require annealing to restore ductility. Surface Preparation Tantalum weldments must be chemically clean and free of oxide scale prior to welding. Joint preparation should include machining, and rough edges should be filed smooth. The joint should...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430107
EISBN: 978-1-62708-253-2
... diffraction, and neutron diffraction. These techniques provide information on the chemical composition of the material, microstructure and phase analysis, and also the surface characteristics. From a failure investigation point of view, the characterization of boiler tubes entails the determination...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280149
EISBN: 978-1-62708-267-9
..., and headers and manifolds for chemical and petrochemical processing. The potential problem in welding these materials is base metal grain size. As grain size increases, weldability decreases. In some applications, a minimum grain size in the base metal is specified for maximum creep resistance. As grain...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2004
DOI: 10.31399/asm.tb.ps.t62440103
EISBN: 978-1-62708-352-2
... that the surface of these base metals will be covered with more than 5 nm (0.2 μin.) of oxide within 5 min of the cleaning operation, although the oxide layer could be substantially thicker if the same metal were exposed to certain chemicals or heated in air. Obviously, this surface contamination must be removed...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 January 2023
DOI: 10.31399/asm.tb.itfdtktmse.9781627084406
EISBN: 978-1-62708-440-6
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.pb.t51230105
EISBN: 978-1-62708-351-5
... and enhance wetting. Oxide coatings on the components and braze can be removed using chemical agents. Acids, alkalis, pH-neutral organic chemicals, and salt bath cleaning methods have been developed for most common engineering metals and brazes. Recipes can be found in a number of reference works...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290165
EISBN: 978-1-62708-306-5
... conditions, storage and handling practices, and other factors. Cleaning operations are commonly categorized as being either chemical or mechanical. Chemical cleaning is the most effective means of removing all traces of oil or grease. Trichloroethylene and trisodium phosphate are the usual cleaning agents...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910363
EISBN: 978-1-62708-250-1
... Preparation A variety of surface preparation methods are available, including the following: Solvent or chemical washing Steam cleaning Hand tool cleaning Power tool cleaning Water blasting Abrasive blast cleaning Table 1 lists the uses and applicable standards...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780141
EISBN: 978-1-62708-268-6
... completely removes whatever it is supposed to remove. Test solutions can contaminate products or result in an out-of-calibration condition if the test solution is contaminated. Chemical-concentration-monitoring equipment, for example, usually requires calibration with a test solution of known...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050173
EISBN: 978-1-62708-311-9
... Abstract The surface condition of metals can have a significant effect on the outcome of high-temperature processes and vice versa. This chapter discusses the general cleaning and surface treatment needs of work in-process both before and after induction hardening. It identifies contaminants...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.ssde.t52310233
EISBN: 978-1-62708-286-0
... chemical neutrality, biological neutrality, and cleanliness. A vast majority of stainless steel applications in commercial and residential equipment are also discussed. stainless steel commercial equipment residential equipment Summary STAINLESS STEEL HAS BECOME the essential material...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.mgppis.t60400087
EISBN: 978-1-62708-258-7
.... It all began with Henry Clifton Sorby on July 28, 1863. Sorby, whose photograph can be seen in Fig. 4.1 , was an English geologist, petrographer, and mineralogist who was the first person to examine polished and chemically etched metal samples under the microscope. His samples included Swedish wrought...
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
... nitrate, and 1% sodium chloride bath. The strong oxidizing action of such a bath chemically alters the chromium oxide in the scale to a more soluble oxide without attacking the metal, making it more easily removed by subsequent pickling. Cleaning Stainless steel is very resistant to chemicals...