...CRA Hydrogen Sulfide Chromium Nickel Molybdenum passive film INTRODUCTION The increasing demand for oil and gas has led to the development of wells with high pressure / high temperature (HPHT) and/or high concentrations of hydrogen sulfide. Corrosion resistant alloys (CRAs) are standard...

... Molybdenum Tungsten Alloy Coating Electrodeposition Corrosion Immersion Corrosion Barrier Layer Connectors CONCLUSIONS INTRODUCTION Electrodeposited nickel has long been utilized as barrier layer for electronic connector and backplane applications to prevent the interdiffusion of gold and copper...

... of the metal under the sour condition. In addition to that, alloying tungsten and nitrogen as well as chromium and molybdenum improves the pitting and crevice corrosion resistance. The PREW (Pitting Resistance Equivalent number with tungsten(W); %Cr +3.3*(%Mo +0.5*%W) +16*%N) of this alloy achieves more than...

...Abstract Conventional 18Cr-8Ni austenitic stainless steels with high molybdenum content such as UNS S31603 (316L) and UNS 31703 (317L) are effective for use in most naphthenic acid corrosion (NAC) environments. However, type 316L or 317L have the risk to polythionic acid stress corrosion cracking...

... of internal proton reduction in driving the crevice corrosion of these Ni alloys was found to be quite significant; greater than 50% of the corrosion damage is caused by proton reduction inside the crevice. Ni-Cr-Mo alloys Crevice corrosion Molybdenum Galvanostatic polarization Introduction Extensive...

... depending upon the concentration, temperature and the presence of oxidizing impurities (like ferric ions, cupric ions etc.). Nickel-alloys containing optimum amounts of chromium (Cr), molybdenum (Mo) and tungsten (W) are widely used in the chemical process industries due to their tolerance to both oxidizing...

... (e.g; nitric acid and ferric and cupric chloride) while its molybdenum content determines its resistance to reducing media (e.g, hydrochloric and dilute sulfuric acids). Aqueous Corrosion Salts Halides Brine Seawater Pitting Crevice Corrosion Nickel Alloys Molybdenum Welding Stress Corrosion...

... exposed in geothermal fluids derived from the Ohaaki-Broadlands geothermal resource in New Zealand are reported. Coupon materials of titanium (and two titanium alloys), a zirconium alloy, a cobalt alloy, tantalum and molybdenum were exposed for periods of up to 1 year in two-phase fluid, separated brine...

... been developed for line pipe usage in slightly sour environment. Chromium and cooper are actively used as alternative corrosion resistant elements instead of molybdenum. The feature of the material is to provide sufficient SSC resistance in slightly sour environment in spite of smaller molybdenum...

... chlorides air pollution control corrosion testing UNS S31277 UNS N10276 UNS S31603 UNS S31803 UNS S32750 manganese nitrogen molybdenum nickel sulfur dioxide pH sulfuric acid INTRODUCTION Coal-fired power plant flue gas desulfurization (FGD) sulfur dioxide abatement systems have experienced...

...Abstract It is very profitable to apply CRA’s (corrosion resistant alloys) to sour environment. Molybdenum has been utilized to enhance the corrosion resistance of conventional alloys. A Mo-less CRA has been newly developed for relatively milder sour conditions considering “fitness for purpose...

...Stainless Steel Nickel Alloy Super-Austenitic Corrosion Fabrication Seawater Marine Chemical Processing Welding Molybdenum Pitting Crevice Corrosion Introduction The nickel-chromium-molybdenum and iron-nickel-chromium-molybdenum families of alloys are widely used in the various...

... applications. However, a 7% molybdenum advanced super-austenitic stainless steel designated UNS S31277 has been developed. This material offers resistance to corrosion equivalent to more highly alloyed nickel-base alloys in many applications. In addition the stainless steel product offers good fabricability...

...naphthenic acid TAN molybdenum corrosion austenitic stainless steel INTRODUCTION The use of molybdenum (Mo) containing stainless steels for naphthenic acid corrosion (NAC) is a common practice in the refining industry. When asked, what makes Mo the alloy element of choice in naphthenic acid...

...Abstract The influence of the addition of molybdenum on the oxidation behavior of Fe-25Cr-20Ni alloys was studied in an N₂-H₂-H₂O gas mixture at 700 to 900°C. The mass gain followed a near-parabolic rate law or a slightly slower rate law for all the specimens...

... chromium molybdenum 316 stainless steel Effect of temperature on the corrosion behavior of metals Figure 6 shows X-ray patterns of pure Fe, Cr, and Mo exposed at temperatures of 300-450 °C and 30 MPa in 5 mass% NaCl. Pure Fe shows peaks of oxides Fe₃O₄ or γ...

... hydrogen peroxide iron nickel chromium molybdenum titanium oxidation dissolution pitting corrosion transpassive dissolution INTRODUCTION Supercritical water oxidation (SCWO) has lately attracted considerable attention as a method of destroying hazardous and toxic wastes. This technology offers...

...alloy 625 nickel molybdenum chromium alumina sapphire high-temperature water HCl Supercritical Water Oxidation SCWO INTRODUCTION In the supercritical water oxidation process (SCWO), hazardous or toxic organic contaminants in aqueous wastes are rapidly and quantitatively oxidized...

... for the formation of highly alloyed austenitic stainless steel surfaces on conventional 304 SS substrate. Microstructural characterisation by optical and SEM revealed finer cells of austenitic phase in the laser alloyed zones with molybdenum contents in the range of 3 to 15 wt%. The pitting corrosion resistance...

... shown that all of the stainless steels containing both nitrogen and molybdenum have pit nucleation potentials significantly higher than either 304 and 316 stainless steels. The nitrogen-molybdenum synergism is demonstrated by the fact that as little as 0.47 wt % N has a large effect on increasing...