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corrosion testing

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Published: 01 December 2019
Fig. 10 Surface of fractured steels, after corrosion testing according to NACE TM 0177-96 method “A” standard in 5.0% NaCl + 0.5% CH 3 COOH at T = 23 °C and pH 3.5. The applied stress was 100% of the YS of the steels ( a ) A216-WCC, ( b ) A217-WC9 More
Image
Published: 01 December 2019
Fig. 11 Transverse sections of steels showing SSC cracks, after corrosion testing according to NACE TM0177-96 method “A” standard in 5.0% NaCl + 0.5% CH 3 COOH at T = 23 °C and pH 3.5. The applied stress was 100% of the YS of the steels ( a ) A216-WCC, after 4 h of testing, ( b ) A217-WC9 More
Image
Published: 01 December 1993
Fig. 5 Macrograph of the specimen after intergranular corrosion testing. 4.74× More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0048620
EISBN: 978-1-62708-225-9
... in the nut to promote this type of failure by normal installation because there was no evidence of excessive tightening of the nut. Corrosion testing of the nuts indicated that the fractured nut was highly susceptible to intergranular corrosion because of either a deficiency in magnesium content or excessive...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001070
EISBN: 978-1-62708-214-3
... Abstract Although field corrosion tests had indicated that type 316L stainless steel would be a suitable material for neutralization tanks, the vessels suffered severe corrosion when placed in service. Welded coupons of type 316L had been tested along with similar Alloy 20Cb® (UNS NO8020...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c0091350
EISBN: 978-1-62708-227-3
... temperatures of 66 to 180 deg C (150 to 350 deg F), an alloy such as 5083 can become susceptible to intergranular corrosion. Investigation (visual inspection, corrosion testing, SEM images) supported the conclusion that the cracks occurred because during exposures to chloride solutions like seawater, galvanic...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001022
EISBN: 978-1-62708-214-3
... and adjoining wall between the steel sleeve and the steel diaphragm washer. Metallographic analysis and accelerated corrosion tests showed that the cracks had originated as stress-corrosion failures. Forgings, corrosion Landing gear, corrosion 2014 UNS A92014 Intergranular corrosion Stress-corrosion...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001349
EISBN: 978-1-62708-215-0
... indicated severe sensitization in the HAZ due to high heat input during welding. An intergranular corrosion test confirmed the observations. The severe sensitization was coupled with residual stresses and exposure of the assembly to a coastal atmosphere during storage prior to installation. This combination...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001547
EISBN: 978-1-62708-225-9
... concentration depended on end hook bend sharpness. Also, interference fits are to be avoided in the end hooks of small springs. Additionally, a need for careful consideration of the stress-corrosion properties of candidate materials for spring applications has been demonstrated by stress-corrosion test results...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0048814
EISBN: 978-1-62708-229-7
... by series of controlled crack-propagation-rate stress-corrosion tests that A302, grade B, steel was susceptible to transgranular stress-corrosion attack in constant extension rate testing with as low as 1 ppm chloride present. It was recommended to maintain the coolant environment low in oxygen and chloride...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0048607
EISBN: 978-1-62708-225-9
... disclosed a copper-colored residue adhering to the threads. This residue was from the antiseizure compound that had been applied during assembly. Accelerated Corrosion Testing Laboratory corrosion tests were conducted on four bolts taken from stock. The purpose of the tests was to determine...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001789
EISBN: 978-1-62708-241-9
... of success in naval applications. Material samples were examined using chemical analysis, SEM imaging, and corrosion testing. Investigators also analyzed precracked tension specimens, exposing them to different conditions to quantify stress intensity thresholds for environmentally assisted cracking. Al-Si...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001820
EISBN: 978-1-62708-241-9
...) for fracture in stress corrosion tests Table 7 Test time (h) for fracture in stress corrosion tests Applied stress (% yield strength of steel) Steel 100 70 A216-WCC 4 223 A217-WC9 12 467 Fig. 9 A216 and A217 polarization in H 2 S-saturated NACE TM0177 “A” solution (5.0...
Image
Published: 30 August 2021
Fig. 11 Die-cast zinc alloy nuts from a water tap. (a) Nut for the cold-water tap that failed by stress-corrosion cracking. (b) Mating nut for the hot-water top that shows only isolated areas of corrosion. (c) Unetched section showing metal in the cold-water tap after corrosion testing More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0091727
EISBN: 978-1-62708-217-4
...-corrosion resulting from contamination during misprocessing of the vessels. However, another vessel underwent a more severe testing procedure and failed catastrophically. Further investigation supported the conclusion that the failure cause was SCC of titanium in methanol. Attack is promoted by crazing...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001348
EISBN: 978-1-62708-215-0
..., the locations of the samples were established. The types of samples selected and their locations are shown in Fig. 1 . Fig. 1 Schematic of the helium storage tank. The areas where samples were taken are indicated: 1, intergranular corrosion testing; 2, hardness testing; 3, microscopy; 4, fractography; 5...
Image
Published: 01 June 2019
Fig. 1 Die-cast zinc alloy nuts from a water tap. (a) Nut for the cold-water tap that failed by SCC. (b) Mating nut for the hot-water top that shows only isolated areas of corrosion. (c) Unetched section showing metal in the cold-water tap after corrosion testing. 600× More
Image
Published: 01 December 1993
Fig. 1 Schematic of the helium storage tank. The areas where samples were taken are indicated: 1, intergranular corrosion testing; 2, hardness testing; 3, microscopy; 4, fractography; 5, residual stress measurements; 6, Chemical analysis More
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001377
EISBN: 978-1-62708-215-0
... failures; it was necessary to have water with dissolved H 2 S for failures to occur. The visual appearance of the H 2 S fractures was quite similar to service failures ( Fig. 12 ). Stress-corrosion tests: effect of bolt tension and vendor comparison Table 3 Stress-corrosion tests: effect of bolt...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001674
EISBN: 978-1-62708-234-1
... Abstract Accelerated aging tests on detonator assemblies, to verify the compatibility of gold bridgewire and Pd-In-Sn solder with the intended explosives, revealed an unusual form of corrosion. The tests, conducted at 74 deg C (165 deg F) and 54 deg C (130 deg F), indicated a preferential...