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corrosion detection

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c0007736
EISBN: 978-1-62708-219-8
..., and chloride was detected in some of the pits. The test also revealed an initial crack that was probably caused by hydrogen embrittlement. Since no chloride was detected on the fracture surface, and none was detected in the overlying concrete, the corrosion appears to have begun prior to the wires' placement...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001002
EISBN: 978-1-62708-229-7
..., but can most probably be attributed to corrosion fatigue. The failure in the boiler steam drum emphasizes the need for careful internal inspection of such components. In the event of cracking as described being detected, it may be appropriate to review the design carefully, with the object of reducing...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001634
EISBN: 978-1-62708-221-1
... and Testing Detecting corrosion of the reinforcing strands in wire-reinforced hydraulic hoses can be very difficult. Visually checking is usually insufficient to detect if there is a problem with corrosion of the wire reinforcement. Unless there is extensive corrosion and the resultant corrosion product...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001635
EISBN: 978-1-62708-221-1
... whether potential corrosion damage could be detected. The results were very positive, with an example of a radiograph shown in Fig. 5 . From the radiograph it could clearly be seen that three of the six wire spiral layers had been corroded away. This was visually confirmed when the ferrule was removed...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001115
EISBN: 978-1-62708-214-3
.... Reported to be a hydril CS connection, the pin end parted near the last threads. The external surface exhibited mechanical damage marks from the fishing operation. No signs of external corrosion or damage were detected. Visual surface examination revealed shear lips at the outside pipe, indicating...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001518
EISBN: 978-1-62708-228-0
... of hydraulic hose failures and their consequential impact on the safety of the work environment. Inspection and Testing Detecting corrosion of the reinforcing strands in wire-reinforced hydraulic hoses can be very difficult. Visually checking is usually insufficient to detect if there is a problem...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001639
EISBN: 978-1-62708-229-7
... transducers and two cameras. The purpose of this inspection was to verify corrosion models and to investigate the possibility of previously unidentified corrosion sites or mechanisms. The inspections included evaluation of previously identified leak sites, thickness mapping, and crack detection scans...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0006417
EISBN: 978-1-62708-234-1
..., presumably in an oxide form. The inside surface had the appearance of typical corrosion products. Hardness measurements indicated that the 4340 steel was heat treated to a strength of approximately 862 MPa (125 ksi). It was concluded that the oxide detected on the ballast elbow was iron oxide...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001355
EISBN: 978-1-62708-215-0
..., typical of fatigue cracks. The oxide-filled cracks appeared to have originated at small surface pits and probably propagated in a fatigue or corrosion-fatigue fracture mode. These cracks were not detected by visual examination or by magnetic particle inspection. The microstructure of the blade consisted...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0001667
EISBN: 978-1-62708-225-9
... Abstract Hydrogen-assisted stress-corrosion cracking failure occurred in four AISI 4137 chromium molybdenum steel bolts having a hardness of 42 HRC. The normal service temperature (400 deg C, or 750 deg F) was too high for hydrogen embrittlement but, the bolts were subjected also to extended...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001050
EISBN: 978-1-62708-214-3
... corner in contact with the edge of the head. The material was a hardened gray cast iron containing 2.8% Ni and 1.2% Mo. Based on the results of visual, nondestructive, metallographic, and chemical analyses, it was concluded that failure occurred after corrosion fatigue cracking had weakened the shell...
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
... elements are suggestive of the presence of erosion and/or corrosion debris from metallic components within the cooling system. The deposit that was scraped from the cylinder was found to contain primarily carbon and nickel, along with detectable iron, silicon, aluminum, calcium, sulfur, and oxygen...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0049796
EISBN: 978-1-62708-235-8
... heating of the bridgewire. Evidence of severe corrosion was revealed on examination of the nickel-chromium-iron alloy bridgewire and the nickel-iron alloy pins. Metallic elements in the pin or bridgewire and substantial amounts of chlorine were detected from the x-ray spectra. Morphological changes...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0046870
EISBN: 978-1-62708-217-4
... 10,000 h of flight time. The crack was detected during a routine overhaul that was conducted about 1000 h after the previous overhaul. Fig. 1 Hollow, splined alloy steel shaft that failed by corrosion fatigue in aircraft service because of exposure to hydraulic oil that was contaminated with water...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001001
EISBN: 978-1-62708-229-7
... of the shell wall itself. The boiler had been in operation for approximately 160,000 h and was shut down for inspection when the cracking was detected. The material involved was 2.25 Cr, 1 Mo steel, and the unit had been subjected to 115 shutdowns. Initiation of the cracks was attributed to thermal shock...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001684
EISBN: 978-1-62708-225-9
... to improve the corrosion resistance in general [ 6 ] and in salt water [ 3 ]. In the EDS analysis, Sn was only rarely detected, but the insensitivity of the technique cannot preclude the possibility that some of the components are made of a Sn-containing brass. It is interesting to note that visual...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001673
EISBN: 978-1-62708-227-3
... elements detected. In the base metal tube spectrum copper, nickel and iron were detected. The chemistry was in agreement with alloy C70600 (UNS), also known as 90-10 cupronickel [ 1 ]. Cupronickels are known for their resistance to seawater corrosion. They are used in seawater piping evaporators...
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
... with a strong light, and a long stemmed mirror. Major surface flaws or other pronounced surface features can be picked up in that manner. However, it would be hard to detect minute corrosion pitting. To detect tiny pits on the interior surface of the truck beam, a boroscope or other remote optical or video...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006758
EISBN: 978-1-62708-295-2
... variations may be detected with UT or RT. Knowledge of the part’s service environment is also important to assess if the part may have been in a potentially aggressive or corrosive atmosphere, such as humidity or salt or if dissimilar material conditions existed. Residue from corrosion...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001072
EISBN: 978-1-62708-214-3
... mode. Even the finest cracks were filled with a corrosive product ( Fig. 7 and 8 ). Energy-dispersive spectroscopy detected the presence of potentially corrosive chlorine and sulfur, probably in the form of chlorides and sulfides. The fact that these products were present in the cracks was further...