... and electrochemical techniques for Ni-based CRAs in various corrosive solutions. The motivation of this study is to understand the materials performance in oxidizing acid (such as nitric acid) and acidic solutions containing oxidants (like ferric ion, cupric ion, peroxide etc.). An attempt was further made...

... of sensitization on the uniform and localized corrosion resistance performance of the alloys, the heat-treated specimens were tested in various acidic solutions, like hydrochloric acid (HCl), sulfuric acid (H₂SO₄), nitric acid (HNO₃) and acidified ferric chloride (ASTM G-48C). Ni...

...Abstract Sometimes referred to as “the gold standard” for nitric acid heat exchangers, zirconium offers excellent corrosion resistance to nitric acid in all concentrations up to 90% and higher temperatures. The most important problem is, that retrofitting a shell-and-tube heat exchanger or other...

...Ni-Cr-Mo Alloys Ni-Cr-Mo-W Alloys Stainless Steel Hydrochloric Acid Sulfuric Acid Nitric Acid Mixed Acids Iso-Corrosion Curve Potentiodynamic Polarization Technique INTRODUCTION Sulfuric acid (H₂SO₄), hydrochloric acid (HCl) and nitric acid (HNO₃) are among...

...Titanium nitric acid 1,2,4,5-tetramethylbenzene vent line fire explosion INTRODUCTION A specialty chemical company was the manufacturer of organic acids for making fire retardant fabrics in batch runs using a titanium reactor. The reactor was 3 ½ years old. Major ingredients in the reactor...

... behavior of their welds and heat-affected zones (HAZ), in effect the weak links in any welded structure. In this study, welds and heat-affected samples of a relatively new nickel alloy, containing 22% molybdenum and 15% chromium, were tested in hydrochloric acid, sulfuric acid, nitric acid, and ferric...

... chemical processing petrochemical processing stress corrosion localized corrosion pitting crevice corrosion caustic stainless steels sulfuric acid hydrochloric acid nitric acid oxidation carburization sulfidation metal dusting INTRODUCTION As operators and engineers attempt to operate...

...The objective of this research is to examine the morphological changes in polyethylene caused by nitric acid. FTIR is a suitable analytical method, as image-guided infrared microscopy is able to observe the penetration of nitric acid into the grade and the progression of polymeric oxidation...

... method of monitoring the corrosion degradation of nuclear material dissolvers and assessing their remaining lifetimes. Materials were typically processed in nitric acid based (4-14 M) solutions containing fluoride concentrations less than 0.2 M. The primary corrosion issue for the stainless steel...

... steel corrosion hydrofluoric acid nitric acid potentiodynamic polarization EIS INTRODUCTION In this manuscript we present corrosion results based on immersion, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) tests of 304L stainless steel. Although the potentiodynamic...

.... Corrosion tests results are presented based on mass loss and surface appearance which includes microstructural and surface analysis. 304L Stainless steel centrifugal contactor hydrodynamic effects rotating cage nitric acid hydrofluoric acid erosion corrosion where, ∆w is mass loss in g; A is area...

...Figure 6 shows corrosion rates of alloy 45Cr1Mo, alloy 690, alloy 22 and type 316L stainless steel in 3% hydrofluoric acid with various amounts of nitric acid from 0 to 17% held at 60 °C. In 3% hydrofluoric acid without nitric acid, alloy 22 shows lower corrosion rate than alloy 690 and alloy...

... on the suitability of materials for this application. Nitric Acid Abstract Rapid corrosion occurs on many materials exposed to highly oxidizing mineral acids, such as concentrated sulfuric and nitric acids. Alloy 33 (UNS R20033) was specifically developed to have excellent corrosion resistant in these types...

...titanium zirconium tantalum failures nitric acid NOx sulfuric acid INTRODUCTION Reactive metals have been used successfully in the Chemical Process Industry for many years. They can be used in a wide variety of chemical processes, both oxidizing and reducing in nature. However...

...Before World War 1, nitric acid was produced by the route operated at atmospheric pressure. During World War 1, the DuPont Company made the commitment of supplying explosives to the United State Government and her Allies. It became important to have an assured supply of nitric acid. Examining...

... that the large ICD of the 0.05%C alloys was caused by conventional sensitization. Abstract The effects of C, P, S, and N on the transpassive corrosion of high purity(HP) Fe-18Cr-14Ni alloys were studied in 13 kmolm⁻³ [0.36 kmol/ft³] nitric acid(HNO₃) and 13 kmolm⁻³...

...Abstract The effects of silicon (Si) and manganese (Mn) on the transpassive corrosion of high purity Fe-18Cr- 14 Ni alloy were studied in 13 kmolm^-3 nitric acid (HNO₃) and 13 kmolm^-3 HNO₃ containing ceric (Ce⁴⁺) ions. Alloy specimens of 99.99...

... of these tests, which included a variety of base metal alloys / weld filler material combinations, are presented and discussed. Radioactive waste nuclear fuel reprocessing high chromium nickel alloys super alloys process evaporators nitric acid nitrates fluorides chlorides sulfates dissolved corrosion...

... HP 18Cr-12Ni alloys is almost the same up to 200 h in boiling 13 N nitric acid solutions. From 300 h, the corrosion loss of the type 304L SS is larger than that of the HP 18Cr- 12Ni alloys. Up to 200 h immersion, in the type 304L SS, corrosion rate calculated from Figure 1 is 2.6×10^-8...

... nitric acid sensitization inter-granular corrosion trans-passive corrosion cold work dislocation martensite INTRODUCTION In the Purex reprocessing process, the spent nuclear fuels from light water reactors are dissolved in nitric acid to separate and recover the fissile materials such as Uranium...