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grease degradation

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Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300391
EISBN: 978-1-62708-323-2
... the susceptibility of grease oil plus thickener to thermal degradation. The oils can have molecular changes, as in varnish formation, and the fatty component of the grease can darken or harden. Consistency: The ability of a grease to spread out smoothly under some force. It mostly depends on the grease...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050293
EISBN: 978-1-62708-311-9
... across the flux concentrator as it degrades. The coil should be repaired or replaced. Overheating: Overheating can result in coil failure if insufficient cooling water is flowing through the coil. Water flow can be reduced by cooling system problems, or leaks can occur for any reason. Flux...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780359
EISBN: 978-1-62708-281-5
..., creep rupture, environmental stress cracking, molecular degradation, and fatigue. In the case of failure involving fracture, the determination of the failure mode involves identifying how the crack initiated and how it subsequently extended. This is usually ascertained using a number of visual-based...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480243
EISBN: 978-1-62708-318-8
...-enriched surfaces must be avoided or removed prior to forming, because they lead to notch sensitivity. Contaminated surfaces must also be removed after hot forming. Greases, oils, and cleaning agents containing chlorides (or other halogens) should be avoided on parts to be hot formed, heat treated...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ems.t53730099
EISBN: 978-1-62708-283-9
... Abstract This chapter discusses the structural classifications, molecular configuration, degradation, properties, and uses of polymers. It describes thermoplastic and thermosetting polymers, degree of polymerization, branching, cross-linking, and copolymers. It also discusses glass transition...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300001
EISBN: 978-1-62708-323-2
.... When the Wear of Materials conferences started in 1977, the wear community was sort of divided into two interest groups—namely the “lubricant people” and the “materials people.” The lubricant community primarily consisted of chemists (oil, grease, and additive formulators), chemical engineers...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.ssde.t52310213
EISBN: 978-1-62708-286-0
... in architecture, art, and construction. Corrosion Resistance Corrosion is the life-limiting factor for architectural metals. Steel, copper, aluminum, lead, bronze, and other alloys react with the environment and degrade over time, as does wood, stone, plastic, paint, and even glass. With stainless steel...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300421
EISBN: 978-1-62708-323-2
... using the couple of interest and under conditions that closely simulate the tribosystem of interest. Tribology literature is rife with pin-on-disk studies of oils and greases. The polished balls used as riders in such studies certainly do not simulate the rough grind on a piston ring. The counterface...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300079
EISBN: 978-1-62708-323-2
... differences, but tribologists tend to separate wear and erosion based upon assistance of a fluid. Erosion is a surface degradation process that involves the mechanical action of a fluid. Wear, on the other hand, does not by definition require mechanical action of a fluid. One of the simplest examples...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 September 2023
DOI: 10.31399/asm.tb.stmflw.t59390100
EISBN: 978-1-62708-459-8
... Abstract This chapter describes the properties and attributes of various classes of metalworking lubricants, including mineral oils; natural oils, fats, derivatives, and soaps; synthetic fluids (olefins, esters, polyglycols, ionic liquids); compounded lubricants (oils, greases, fats); aqueous...
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
... resistance. In heat treatable alloys, variations in composition can produce unexpected responses to heat treatments, which result in hard or soft spots, quench cracks, or other flaws. The degree of degradation depends on the alloy and on process variables. Most metallurgical processes are based...
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
... scales superalloys surface cleaning Introduction Background 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 by conventional solvents or soaps. Metallic contaminants, tarnish...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910363
EISBN: 978-1-62708-250-1
.... For example, in underground applications, resistance to cathodic disbonding is required for compatibility with cathodic protection systems. In addition, resistance to soil stresses may be required. In atmospheric corrosion, resistance to ultraviolet degradation, bacteria, and fungi is sometimes an important...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.horfi.t51180091
EISBN: 978-1-62708-256-3
... requirements. Most of the greases commonly used on a shop floor will outgas when put into space. The outgassing material adheres on the surfaces of sensitive hardware such as solar panels or heat rejection panels, accelerating degradation. The International Space Station (ISS) is designed for a lifespan of 20...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780404
EISBN: 978-1-62708-281-5
... physiochemical affinity leading to wetting of the polymer are also known to cause premature failure ( Ref 8 ). Environmentally enhanced failure generally involves crazing or cracking as the underlying mechanism. Degradation by Heat and Light <xref rid="t69780404-ref4" ref-type="bibr">(Ref 4...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230459
EISBN: 978-1-62708-298-3
... of silicone greases. In the latter case, a solvent for silicone grease must be used prior to the alkaline treatment [ Mueller and Adolphson 1979 ]. Other sources of chlorine ions, in addition to tapwater, can be chlorinated solvents used to remove oils and greases. Plastic piping in the cleaning system...
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
... high production Conveyorized spray emulsion washer Alkaline soak, hot rinse alkaline spray, hot rinse Alkaline or acid (d) soak, hot rinse, alkaline or acid (d) spray Hot emulsion or alkaline soak, hot rinse, electrolytic alkaline, hot rinse Removal of unpigmented oil and grease...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780028
EISBN: 978-1-62708-281-5
... are particularly sensitive to acid hydrolysis. The carbonyl group of ketones, esters, and carbonates (shown in Fig. 2 ) strongly absorbs UV light in the 2800 to 3200 Å range, thus leading to polymer instability and poor outdoor aging characteristics. The ester group may hydrolyze and degrade upon exposure...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350043
EISBN: 978-1-62708-315-7
.... Some of the energy is dissipated in various deformation processes, which result in wear of the sliding surfaces and their eventual degradation to the point where replacement of whole components becomes necessary. Wear of sliding surfaces adds another, very large component to the economic importance...
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
... minimize fingerprinting. Glass cleaner is appropriate for mirror finishes. Grease, oil Hydrocarbon solvent Alkaline cleaners may also be used in severe cases but may require cleaning the entire surface to maintain visual uniformity. More severe stains, discolorations, and rust stains Nonscratching...