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primers

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Published: 01 June 2019
Fig. 3 Corrosion pitting and cracking appeared under the green (G) epoxy primer and gray paint (P) near the start of fracture of Fig. 2 . Magnification 420 times. More
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001298
EISBN: 978-1-62708-215-0
... of significant amounts of corrosion product and all of the pits were filled with corrosion-preventative primer. This indicated that the pitting occurred during spar manufacture, prior to the application of the primer The pitting resulted from multiple nickel plating and defective plating removal by acid etching...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0091678
EISBN: 978-1-62708-217-4
... by application of a coat of paint primer. During routine maintenance checks, a careful examination was suggested to look for damage to the protective coating, and any necessary repairs should be made by cleaning, priming, and painting. Severely corroded parts should be removed from service. Aircraft...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0006402
EISBN: 978-1-62708-217-4
... to anodizing. A hot inhibited alkaline cleaner was also recommended during cleaning prior to anodizing. The panels should be dichromate sealed after anodizing. The use of deionized water was also recommended during the dichromate sealing operation. In addition, the use of an epoxy primer prior to shipment...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001706
EISBN: 978-1-62708-217-4
... intergranular cracks were found emanating from the bottom of the pit and branched inward as shown in Figure 9 . The morphology and crack propagation pattern were characteristic of SCC. Detailed examination of the pit showed traces of manganese phosphate coating that was applied as primer on the inner surface...
Image
Published: 01 June 2019
Fig. 1 In mating fracture faces of attach fitting, note severely oxidized crack. Zone 1 has red rust scale (Fe 2 O 3 ); Zone 2 has gray-black oxidation scale (Fe 3 O 4 ) on which a yellowish product existed due to seepage of chromate primer; and Zone 3 is a fresh instantaneous ductile More
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001113
EISBN: 978-1-62708-214-3
... A, when viewed at 65× using polarized dark-field lighting, revealed primer paint (light gray) in the crack. Both sample plates exhibited cracks at the bottom-portion fillet-weld HAZ, or weld toe, of each diagonal and vertical angle brace. There was also one horizontal crack in the HAZ of the plate...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001744
EISBN: 978-1-62708-217-4
... product existed due to seepage of chromate primer; and Zone 3 is a fresh instantaneous ductile (overload) final rupture. (See facing page) Fig. 2 Micrograph illustrates a heat-affected zone (HAZ) crack, (arrow) at the toe of the weld of Fig. 1 . Fracture edge is at top of photo. 2 pct Nital...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001717
EISBN: 978-1-62708-217-4
... treatment and final machining, is cadmium coated using a vacuum deposition process. The part is subsequently painted using an epoxy primer. The failure of the part occurred at the radius separating the spindle from the base of the component. This region is subjected to the loads generated by the aircraft...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001746
EISBN: 978-1-62708-217-4
... out radiating river markings. Magnification 6.3 times. Fig. 3 Corrosion pitting and cracking appeared under the green (G) epoxy primer and gray paint (P) near the start of fracture of Fig. 2 . Magnification 420 times. Fig. 4 illustrates eyebolts which broke when used to lift...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001587
EISBN: 978-1-62708-217-4
... in Fig. 4 . These features ranged from light marks in the primer to severe dents and deformation of the metal. Based on relative locations and feature shapes, features labeled a to j in Fig. 4 , were all consistent with contact between the upper surface of the mechanical stop and various portions...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001546
EISBN: 978-1-62708-217-4
... of the reinforcing strap revealed what appeared to be hairline cracks propagating parallel to the longitudinal grain direction. (The grain direction in the reinforcing strap was transverse to its length.) The primer was stripped from the strap, and subsequent examination confirmed that the cracks were in the metal...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001663
EISBN: 978-1-62708-236-5
... and a blank shell is approx 4.7cm. The magazine used in a security exercise for the M-16 rifle shells is designed to accept only the length of a blank shell. During the manufacturer's production charging of the cartridge case with the primer, propellant and the swaging or seating of the projectile, apparently...
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
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003554
EISBN: 978-1-62708-180-1
... with zinc-rich primer by both spraying and brushing. The piping was then welded. Several leaks were identified during hydrotest, and subsequent dye-penetrant examination revealed numerous cracks in the heat-affected zones of the welds. Metallography and EDS again revealed the presence of zinc...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001769
EISBN: 978-1-62708-241-9
... DNA was extracted according to the method described by Murmur [ 23 ], and the small subunit rRNA gene was amplified using universal primers 16S1 (5′-GAG TTTGATCCTGGCTCA-3′) and 16S2 (5′-CGGCTACCTTGTTACGACTT-3′). The PCR products were visualized in 1.5% agarose gel and gel purified using QIA quick gel...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001765
EISBN: 978-1-62708-241-9
...—internal A312-TP 316L or equivalent Plate thickness  Annular plate 16 mm  Bottom plate 6.35 mm (lap welded bottom) Type of CP  External Impressed current  Internal Impressed current Bottom topside (work side) paint dry film thickness (DFT)  Primer Hempadur 1559, DFT 40 μm...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001721
EISBN: 978-1-62708-225-9
... screws to the body of the valve is shown in Figure 1 . Fig. 1 Schematic drawing showing the location of bonnet screw failures with respect to the valve bonnet and body. Installation of these valves included prepping them with a spray on epoxy coating followed by a primer coat and final...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001805
EISBN: 978-1-62708-241-9
... for misuse, failures are inevitable and systematic methods for analyzing them are necessary to keep them in check. References References 1. Louthan M.R. Jr , Hydrogen embrittlement of metals: a primer for the failure analyst . J. Fail. Anal. Prev. 8 , 289 – 387 ( 2008 ) 10.1007/s11668...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006786
EISBN: 978-1-62708-295-2
... was put in place but not welded, the structural steel was painted with zinc-rich primer by both spraying and brushing. The piping was then welded. Several leaks were identified during hydrotest, and subsequent dye-penetrant examination revealed numerous cracks in the heat-affected zones (HAZs...