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metallic coatings

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Published: 01 January 2002
Fig. 20 Erosion rate of metallic coatings (frequency = 20 kHz; distance between specimen and vibration horn = 1 mm; vibration amplitude = 50 μm; temperature = 25 °C; liquid: 3% NaCl aqueous solution). Source: Ref 38 More
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Published: 15 January 2021
Fig. 16 Comparison between metals and ceramic coatings fretted against an alumina ball for similar lading conditions. HSS, high-strength steel. Adapted from Ref 42 More
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003549
EISBN: 978-1-62708-180-1
... in the environment; change in the alloy or heat treatment; change in design; use of galvanic protection; use of inhibitors; use of nonmetallic coatings and liners; application of metallic coatings; use of surface treatments, thermal spray, or other surface modifications; corrosion monitoring; and preventive...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001812
EISBN: 978-1-62708-180-1
...-corrosion cracking, hydrogen embrittlement, and liquid-metal embrittlement of bolts and nuts. The article explains the most commonly used protective metal coatings for ferrous metal fasteners. Zinc, cadmium, and aluminum are commonly used for such coatings. The article also illustrates the performance...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001408
EISBN: 978-1-62708-220-4
... in temperature. The material was a steel in the normalized condition with a 0.35% C content. It appears probable that deficient lubrication of the gland resulted in overheating of the rod due to friction. The presence of a sprayed-metal coating was probably an additional factor in promoting failure, as it would...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001455
EISBN: 978-1-62708-234-1
... during which the tests were carried out and were effective even across 1 2 in. gaps, this no doubt being due to the well-known phenomenon of sacrificial protection. The practice of painting over the gaps machined in the sprayed metal coatings were shown to be a definite disadvantage since...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003569
EISBN: 978-1-62708-180-1
... = 50 μm; temperature = 25 °C; liquid: ion-exchanged water). Source: Ref 37 Surface Coatings and Treatments Surface coatings and treatments include metallic coatings and laser surface modification. Metallic Coatings Interactions of cavitation and corrosion lead to much more material...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006782
EISBN: 978-1-62708-295-2
... been dissolved. Iron is nearly inert in air-free water and seawater, because there is limited cathodic reaction possible. If the surface of the metal is coated with paint or other nonconducting film, the rates of both anodic and cathodic reactions are greatly reduced, and corrosion will be retarded...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001628
EISBN: 978-1-62708-234-1
... that the discoloration on the cylinder was associated with metal oxidation products coated with a thin oil film. One of the recommendations was to plate the OD of the cylinder with hard chromium to increase its resistance to erosion. Another recommendation was to reduce the amounts of water contamination...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003548
EISBN: 978-1-62708-180-1
... coating. If inert barrier coatings are employed, both the anode and cathode must be protected. Effect of Distance Dissimilar metals in a galvanic couple that are in close physical proximity usually suffer greater galvanic effects than those that are farther apart. The distance affects...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006783
EISBN: 978-1-62708-295-2
... cathodic areas coupled to small anodic areas will aggravate galvanic corrosion and cause severe dissolution of the more active metal. The reverse situation—large anodic areas coupled to small cathodic areas—produces very little galvanic current. This is why imperfections or holidays in protective coatings...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001829
EISBN: 978-1-62708-241-9
..., and filler metal are listed in Table 1 . Fig. 1 (a) First-stage vane and (b) inner root area of 700ES Chemical compositions of bond-coat layer, base, and filler metal Table 1 Chemical compositions of bond-coat layer, base, and filler metal Chemical Composition, wt.% Co Cr Ni W...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c0046969
EISBN: 978-1-62708-227-3
... of solid oxide at the blade tip, a layer of oxides in the alloy-depleted nickelbase material, and gray globules of chromium sulfide. (c) and (d) Sections taken through the leading edges of aluminide-coated blades. Corrosion in (c) has penetrated up to the base metal, and in (d) has penetrated into the base...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001592
EISBN: 978-1-62708-228-0
... required 1 is 55 HRC, and the coating thickness was 0.3 mm while the minimum required 1 is 0.25 mm. Fig. 10 Initiation stage Fig. 11 Propagation and final stage of the rupture These results lead to the conclusion that the sprayed metal coating conformed to the reference...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006805
EISBN: 978-1-62708-329-4
... composites Fastener type Fastener material Surface coating Suggested application Epoxy/graphite composite Kevlar (DuPont) Fiberglass Honeycomb Blind rivets (a) 5056 aluminum None Not recommended (b) Excellent (b) Excellent (b) (c) Monel None Good (b...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001391
EISBN: 978-1-62708-215-0
... portion of the metallization, which enabled subsequent electro deposition of the nickel barrier and solderable tin coatings. Metallography Microstructural Analysis In order to determine the construction integrity and material failure mode of the resistor chips, transverse sections of samples...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003555
EISBN: 978-1-62708-180-1
... and metal dusting, sulfidation, hot corrosion, chloridation, hydrogen interactions, molten metals, molten salts, and aging reactions including sensitization, stress-corrosion cracking, and corrosion fatigue. It concludes with a discussion on various protective coatings, such as aluminide coatings, overlay...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001281
EISBN: 978-1-62708-215-0
... results in excessive metal temperatures. The elevated temperatures promote cracking or spalling of the coating because of thermal stresses and lead to hot corrosion of the base metal. The durability of aluminide coatings depends on their adherence. If the coating is damaged or removed, oxides will form...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c9001574
EISBN: 978-1-62708-223-5
... Abstract A CrN coated restrike punch was made of WR-95 (similar to H-11), which was fluidized bed nitrided. The coated punch was used on hot Inconel at about 1040 deg C (1900 deg F). However, a water-soluble graphite coolant was used to maintain the punch temperature at 230 deg C (450 deg F...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001613
EISBN: 978-1-62708-235-8
... ). The region of brittle fracture is attributed to hydrogen embrittlement due to hydrogen uptake during plating and pickling. This dissolved hydrogen diffused into the metal and precipitated at the internal defects, inclusions, interfaces, etc., and formed as nascent hydrogen. This precipitation led...