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coating degradation

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Published: 01 March 2001
Fig. 11 Illustration of the mechanism of corrosion for painted steel. (a) A void in the paint results in rusting of the steel, which undercuts the paint coating and results in further coating degradation. (b) Photograph showing blistering and/or peeling (undercutting) of paint where exposed More
Image
Published: 01 January 2000
Fig. 11 Illustration of the mechanism of corrosion for painted steel and painted galvanized steel. (a) A void in the paint results in rusting of the steel, which undercuts the paint coating and results in further coating degradation. (b) Photograph showing blistering and/or peeling More
Image
Published: 01 March 2002
Fig. 13.14 Effect of a nickel-aluminide-type coating on the hot corrosion resistance of an IN-713 nickel-base superalloy turbine blade compared with an uncoated blade. (a) Uncoated blade after 118 test cycles, (b) micrograph showing severe degradation of IN-713 by hot corrosion, (c) aluminide More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780329
EISBN: 978-1-62708-281-5
... ultraviolet light absorbers, oxidation inhibitors, and the use of protective coatings, are also considered. photolytic degradation artificial light sources photooxidation photochemical reactions ultraviolet light absorbers oxidation inhibitors protective coatings ENGINEERING PLASTICS...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490415
EISBN: 978-1-62708-340-9
... curves for superalloys at 850 °C (1560 °F). It is important to note that the data presented in Fig. 9.12 are applicable only to uncoated base material tested under continuous cycling in air. The presence of coatings, corrosion processes, in-service degradation, and application of hold times can...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280287
EISBN: 978-1-62708-267-9
... coating users and data providers assume similar performance of a given coating on a variety of alloys of similar (e.g., nickel) base metal. Degradation by Gaseous Oxidation or Mixed Gases Gas Turbine Materials At intermediate temperatures—below about 1600 °F (870 °C)—general uniform oxidation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030237
EISBN: 978-1-62708-349-2
.... Transmitted light, phase contrast, 20× objective Ultraviolet-Light Effects on Composite Materials Matrices in polymeric composites may be subject to degradation by ultraviolet (UV) light (photo-oxidation) if not protected by an appropriate coating. The source of the UV light may be sunlight or one...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280323
EISBN: 978-1-62708-267-9
... or fracture. If a coating is degraded, a component may be susceptible to surface attack and failure has occurred. Similarly, if a part creeps during operation so that the part begins to impinge on another part, failure has occurred. In the general sense, elevated-temperature failure modes may...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870401
EISBN: 978-1-62708-314-0
... to darkening of the resin at the surface layer. Aramid fiber, in particular, is subject to UV degradation. In general, polyester resins are more resistant to UV radiation than epoxies. Standard marine paint, pigmented gel coatings, and polyurethanes have been used to prevent UV damage and weathering erosion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780146
EISBN: 978-1-62708-281-5
... Abstract This article discusses the chemical susceptibility of a polymeric material. The discussion covers significant absorption and transportation of an environmental reagent by the polymer; the chemical susceptibility of additives; and thermal degradation, thermal oxidative degradation...
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
... of mechanical interference, preventing hydraulic actuators from working, valves from fully closing, or many other types of failures due to inhibited motion. Contaminants can degrade bond joints and welds. Contaminants can interfere with switches closing properly. Contaminants can degrade energetic...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780153
EISBN: 978-1-62708-281-5
... to degradation in plastics include temperature variations, moisture, sunlight, oxidation, microbiologic attack, and other environmental elements. The article also describes the tests used to predict the behavior of a plastic material to outdoor exposure, discussing the use of xenon arc lamp for the weatherometer...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2022
DOI: 10.31399/asm.tb.tstap.t56040020
EISBN: 978-1-62708-428-4
... conversion and harvesting, in particular in the following applications: Wear Resistant and Corrosion Resistant Coatings The cost of wear and corrosion are estimated to be a significant fraction (up to 3-5%) of the gross domestic product in developed economies. These phenomena result in the degradation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350095
EISBN: 978-1-62708-315-7
... Abstract This chapter provides practical information on surface treatments that work by altering the surface chemistry of metals and alloys. It discusses the use of phosphate and chromate conversion coatings as well as anodizing, steam oxidation, diffusion coatings, and pack cementation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910363
EISBN: 978-1-62708-250-1
..., or paint applied over soft or wet undercoat Allow to dry and apply another finish coat under acceptable conditions for moisture and humidity. Fading Color changes or irregularities Ultraviolet light degradation or moisture behind paint film Repaint and avoid possible sources of moisture...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870573
EISBN: 978-1-62708-314-0
... of oxide/oxide ceramic matrix composites. 21.3 Interfacial Coatings Interfacial, or interphase, coatings are often required to (1) protect the fibers from degradation during high-temperature processing, (2) aid in slowing oxidation during service, and (3) provide the weak fiber-to-matrix bond...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700177
EISBN: 978-1-62708-279-2
.... Modifications to the current forming system such as higher-tonnage presses, appropriate die materials, effective tool coatings, efficient lubricants, and higher binder forces should be considered. The implications of using thinner gages on the elastic stiffness and corrosion resistance need to be deliberated...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.9781627083409
EISBN: 978-1-62708-340-9
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
... Abstract This chapter covers a wide range of finishing and coating operations, including cleaning, honing, polishing and buffing, and lapping. It discusses the use of rust-preventative compounds, conversion coatings, and plating metals as well as weld overlay, thermal spray, and ceramic...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550569
EISBN: 978-1-62708-307-2
... composite, the interface will be strong enough to transfer load from the matrix to the fiber yet weak enough to allow debonding of the fiber in the path of a crack. Interfacial, or interphase, coatings are often required to protect the fibers from degradation during high-temperature processing, aid...