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Composite materials are being widely implemented for repair scenarios within refineries – domestically and around the world. This paper will discuss concerns, considerations, and needs typically encountered when using Engineered Composite Repair systems to repair live, operating piping systems in a plant environment.
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Pressure cycling and ultimate failure pressure testing was conducted on various pipe samples to verify the design formulas meet the specifications and are correct for use in design of field repairs. Results show that use of strain-based design methodologies for composite repair systems is suitable and effective.
Modern structural biomedical implants utilize titanium alloys. A major mode of failure is aseptic loosening, by the release of particles from the implants, leading to excessive bone erosion. Boron is a promising alloying element that can reduce inflammation, alleviate arthritis, and help with bone growth. This study is to compare corrosion behavior of Ti64 with and without boron,
Currently UNS R56400 (Ti-6Al-4V; Ti64) is common structural implant material. But it releases metal ions into the body, which are associated with neurological disorders, inflammation, pain and loosening of the implant. Electrochemical methods were used to quantify the stability of two other alloys in a range of physiological media.
In this research, the focus was corrosion behavior of two stainless steels (UNS S30400 and UNS S31600) and a carbon steel (UNS G10180). These were tested at 700°C in a molten NaCl-KCl-MgClâ‚‚ eutectic salt in static air and flowing argon. Electrochemical techniques were used to characterize the corrosion behavior.m
Graphene-based nanomaterials is of interest for electronic applications, but not well known in the biomedical and bio-implant fields. This paper highlights work done on utilizing graphene oxide coatings and dispersions as anti-microbial and protective barriers for preventing biocorrosion and biofilm growth.
A quantitative assessment of remnant cold deformation and effectiveness of post deformation treatment (PDT) on sour resistance and mechanical properties of a C110 grade by reproducing uniform deformation with tensile/compressive tests followed by heating/soaking/cooling cycles representing induction PDT
A testing program was designed using high strength martensitic and duplex stainless steels, namely, UNS S41426, 17CR (17Cr-4Ni-2.5Mo-1Cu) and UNS S39274. A round robin testing program was carried out between two laboratories using a 15% HCl based scale dissolver package at 110°C.
The objective of the testing was to establish the pH and temperature boundaries for use of stainless steels UNS S30403 and UNS S31603 in steam condensate. The tests had a parallel objective of demonstrating the extent and morphology of corrosion damage found under controlled conditions
Electrochemical test methods including open-circuit potential, electrochemical impedance spectroscopy, potentiodynamic polarization, and zero-resistance ammetry were used for corrosion investigation of UNS C69100 in a 3.5 wt.% sodium chloride aqueous solution, with optical and scanning electron microscopy.
This paper is to study the corrosion performance of various Ni based alloys in high concentrations of HCl acids below the boiling point. Nickel-based alloys C-276 (UNS N10276), C-22 (UNS N06022), C-2000 (UNS N06200), Hybrid-BC1 (UNS N10362) and B-3 (UNS N10675) were investigated.
This paper discusses a study wherein the SSC resistance of 13Cr bar stock quenched and tempered to 22 HRC maximum hardness was tested and evaluated beyond the maximum H2S limit of 10 kPa (1.5 psi) established in NACE MR0175/ISO 15156-3 for use in sour service.