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Several experiences with the use of titanium heat exchangers in refining processes are summarized. These involve distillation column overhead condensers in atmospheric crude distilling units, fluid catalytic cracking units, delayed coking units, and sour water strippers. The causes of problems are discussed. Needs for additional data are highlighted.
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Alloys of Titanium were compared. Results of crevice corrosion, U-bend, and general corrosion tests in various different media are discussed in this paper. These tests were conducted in order to better understand how Grade 38 compares to common titanium alloys.
Results of laboratory testing of a new technology for mitigating galvanic corrosion. Incorporated into a device, referred to as the galvanic corrosion inhibiting coupling (GCIC) or bi-electrode device (BED), it creates an ohmic potential drop within the pipe and minimizes the polarization of the dissimilar metals.
An unexpected explosion occurred in the vent line connecting at the top of a titanium reactor that was used to make a fire-retardant fabric. In this presentation the cause for this accident will be discussed based on the findings in examining samples from the vent line and the results of high-temperature tests.
Complications occur in orthopedic surgery. Corrosion of magnesium W4 alloy was investigated in vitro by electrochemical methods in solutions replicating the body's environment. To control the biodegradation of titanium and magnesium implants, bio active PEO coatings are essential for biomedical implants.
In this study, two electrochemical techniques were used to characterize corrosion behavior of 17-4 PH stainless steel (UNS S17400), Inconel 625 (UNS N06625) and Ti-6Al-4V (UNS R56400) produced by power bed fusion process at different spatial scale.
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.
UNS R56404Titanium exposure to warm, naturally-aerated, dilute, HF-containing, fresh acid mixtures does result in unacceptable, elevated etch rates. Several common inorganic salts such as aluminum, molybdate, and/or borate salts, inhibit this attack.
Susceptibility of Grades 23 and 29 titanium Tapered Stress Joint (TSJ) forgings to gas phase methanolic Stress Corrosion Cracking (SCC) was measured in deaerated, dry 0-0.5 wt.% and saturated methanol-containing methane gas environments at 25C in a two phase laboratory program.
Corrosion behavior of commercially pure titanium (UNS R50400, ASTM GRADE 2) was investigated in presence of aggressive, bromides containing solution reported to cause more severe localized corrosion compared to chlorides.
This paper will focus on the laboratory corrosion testing of UNS R53400, R56404 and N06625 in a simulated hypersaline geothermal system, such as found in the Salton Sea KGRA.