...Table 1 Chemical composition (wt.%) of studied Ni-base superalloy determined by ICP-OES Co Cr Ti Al Mo W Ta B Zr Hf Re 9.01 7.63 0.92 5.20 0.49 9.16 3.23 0.02 <0.01 1.61 <0.01 Gas turbines in many power plants should be able to operate at increasing...

... not explain all exceptional corrosion cases and that non-compliance does not necessarily lead to corrosion. Some examples: In the concentrated HF-acid system of alkylation units, no cases of high RE-induced corrosion have been reported. Electrochemical polarization measurements in de-oxygenated 98.5%, 90...

... 204 --- Recommended hardness limits using NACE MR0103^{( 1 )} as a guideline • Carbon Steel: 235 HBN • Nickel and UNS N04400: 325 HBN INSPECTION Abstract A solid 8-inch (203 mm) UNS N04400 (Alloy 400) nozzle welded into the carbon steel shell of a Hydrogen Fluoride (HF) acid...

... for non-invasive corrosion assessment of these critical components. HF HFA hydrofluoric acid safety alkylation flange face corrosion damage mechanism Non-Destructive Testing Non-Destructive Examination Ultrasonic Testing Phased Array Risk-Based Inspection RBI Fitness-For-Service FFS...

...(8) HCl ( g ) + NaOH → NaCl + H 2 O (9) 2 HF ( g ) + NaOH → NaHF 2 + H 2 O (10) 4 NO 2 ( g ) + 4 NaOH + O 2 ( g ) → 4 NaNO 3 + 2 H 2 O In the first stage, a venturi quench instantaneously lowers...

... of its sulfuric acid alkylation unit. acid alkylation anchor anti-corrosion concrete caustic soda corrosion high-density polyethylene HDPE HF H₂SO₄ hydrofluoric acid hydrostatic isobutene junction box lift station liner lining manhole NaOH pit plastic...

... increased and is expected to continue to grow as international environmental regulations are implemented. Abstract Despite significant advances in process technology, there continue to be recurring corrosion problems that affect the safety and reliability of HF Alkylation Units. This paper summarizes...

... HCl hydrofluoric acid HF ETFE dual-laminate ASME RTP-1 fiberglass reinforced plastic INTRODUCTION Two scrubbing systems were installed to remove waste gases from a refrigerant manufacturing plant. Each scrubbing system consisted of one scrubbing tower and one recirculation loop storage tank...

... corrosion resistant alloys mud acid HCl HF INTRODUCTION Oil production in Brazil comes mostly from deep waters offshore wells. A number of new fields have been discovered and are being put into production. They are expected to contribute to Brazil’s production target of 2 million barrels a day by 2005...

...: upstream: sour service environments, but also excessive cathodic protection in offshore systems, especially in the new deep sea development projects; downstream: anhydrous HF used as a catalyst for alkylation, but also the onshore cathodic protection of old pipelines. In this respect, the so called "low...

... hydrodesulfurizing effluent ammonium bisulfide HF alkylation corrosion INTRODUCTION Clad materials have gained wide acceptance in the refining and chemical process industries as a method of corrosion control for pressure vessels. This concept has been used as a cost effective alternative to solid alloy...

...INTRODUCTION No effect of the addition of kerosene was observed. DISCUSSION OF RESULTS Inhibitor packages B and F were not effective corrosion inhibitors for 13Cr and the Super 13Cr exposed to 71/2% HCl + 1½% HF acidizing fluids in the inhibitor concentrations and temperatures studied; general...

... presents pressure vessel materials used for both original and new/revamp construction. Table 2 shows the primary fitting specifications used. Abstract The T-8-20 Task Group conducted a survey of plant practices and of the performance of materials of construction in HF Alkylation Units. A primary goal...