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Development of the new fluoropolymer Ethylene-tetrafluoroethylene (ETFE) and severe service environment conditions prompted ETFE’s use as a fabric backed lining laminate in dual-laminate fiberglass reinforced plastic (FRP) storage tanks – the first ever such use of this fluoropolymer.
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This paper summarizes the Top Ten corrosion issues and examines the controlling factors that affect damage including the effects of operating parameters. Best industry practices used to monitor for problems and to inspect for damage are discussed.
Acceptable “industry standard” for dissolving a silicate deposit is hydrofluoric acid. Here, we introduce a safer, more environmentallyfriendly el method for dissolving silicate scales and present a case study for its application in industry.
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.
Corrosion rates of low porosity AM S31603 and AM N06210 in several kinds of acidic solutions were similar to those of wrought alloys respectively, the corrosion rates of AM S31603 and AM N06210 became higher with increasing porosity of each specimen.
In oil refineries, one corrosion issue occurs each week worldwide that leads to a severe incident such as sudden leakages, e.g., resulting from pipe ruptures.[1] These facts emphasize the need for corrosion control in refineries. Corrosion monitoring is one important approach to utilize and can maximize equipment integrity and productivity.
Alloy N06044 was developed for applications in chemical process industry and coal fired boiler. In this paper, corrosion resistant properties of that alloy in acidic solutions are shown.
This laboratory corrosion test screening program is specifically aimed at identifying practical, common inorganic salts which, when added to warm dilute HF solutions, provides effective corrosion inhibition for UNS R56404(ASTM Grade 29 Titanium).
Acid stimulation is a growing practice in the deep water subsea environment. Two acids were tested, one of hydrofluoric and acetic acids and another of hydrofluoric, hydrochloric, and acetic acids. Results and outlines recommendations for different alloys are presented.
HISTORICAL DOCUMENT. Aqueous hydrofluoric acid (HF) is commercially available in 48% and 70% solutions. Commercial anhydrous hydrogen fluoride (AHF) contains less than 400 parts per million by weight (<400 wt ppm) water. Although this report is intended as a guide for handling commercial HF and AHF, additional information is given to aid users of HF who encounter other concentrations.