... the critical, saturation, and supersaturation concentrations at an equal pit depth. Therefore, the concentration of necessary cations increased to precipitate the salt. A comparison of the pit chemistry characteristics between 316SS and 304SS showed that molybdenum increased the potential necessary for salt...

...Kyohei Kanki; Katsuhiro Nishihara; Masayuki Sagara; Hisashi Amaya 13Cr martensitic stainless steel is widely used in the oil and gas industry. It is well known that the addition of molybdenum (Mo) enhances the passivity of steel. However, the role of Mo in the passive film has not been clarified...

... spectroscopy (ICP-AES) molybdenum nickel alloys passivation stainless steels Aqueous metallic corrosion is an electrochemical phenomenon and much of the theory and experimental techniques for predicting and assessing corrosion are based on the application of electrochemical concepts and techniques...

... were repeated for at least five times and the difference between the replicates are represented by their variance. 29 October 2018 08 April 2019 08 April 2019 © 2019, NACE International 2019 critical pitting potential molybdenum pitting stainless steels tungsten...

... the subsequent phase transition and oxide evolution at the atomic scale are relatively unknown. ¹² Beyond the base alloys, the addition of minor alloying elements such as molybdenum (Mo) to the nickel-based alloys can have positive or negative impacts on the oxidation and corrosion behavior...

...Xuemei Ouyang; Guopeng Chen; Fucheng Yin; Ye Liu; Manxiu Zhao The effect of Mo on the microstructure of as-cast Fe-3.5 B alloys and their corrosion behavior in molten zinc have been investigated. Experimental results show that the as-cast Fe-B alloys with molybdenum addition are mainly composed...

..., particularly in acidic solutions, to polarize the Alloy 22 well into the transpassive region, leading to the observed high-corrosion rates. Alloy 22 chromium Hastelloy C-22 hydrochloric acid molybdenum nickel Ni-Fe-Cr-Mo non-aqueous organic solvent quinone transpassivity Hastelloy Alloy C...

...% of the corrosion damage is caused by proton reduction inside the crevice. ^‡ Corresponding author: [email protected] . © 2015, NACE International 2015 crevice corrosion galvanostatic polarization molybdenum Ni-Cr-Mo alloys Extensive industrial effort has been invested...

... author. E-mail: [email protected] . January 2009 October 2009 4 2010 NACE International 2010 Alloy 22 Alloy 625 crevice corrosion corrosion critical crevice potentials molybdenum Ni-Cr-Mo alloys It is well known that elements such as Cr, Mo, W, and others, when...

... NACE International 2009 corrosion austenitic stainless steel crevice corrosion laser welding localized corrosion nitrogen molybdenum pitting In addition to UNS N08367, three other related SASS materials were also examined in the course of this research. These alternatives...

... 2005 August 2006 NACE International 2007 chromium high-strength low-alloy hydrogen diffusion microstructure molybdenum sulfide stress cracking FIGURE 6 Corrosion current in the very early stage of corrosion. (Estimated by linear polarization test method...

...J.R. Hayes; J.J. Gray; A.W. Szmodis; C.A. Orme The addition of chromium and molybdenum to nickel creates alloys with exceptional corrosion resistance in a diverse range of environments. This study examines the complementary roles of chromium and molybdenum in nickel alloy passivation. Four nickel...

... (UNS S30403) stainless steel. ‡ Corresponding author. E-mail: [email protected] . January 2005 NACE International 2006 breakdown copper corrosion dilution nickel Ni-Cu alloys open-circuit potential palladium molybdenum noble metal repassivation segregation stainless...

...E. Asselin; A. Alfantazi; S. Rogak A polarization study of Alloy 625 (UNS N06625), nickel, chromium, and molybdenum, in a solution of ammonia (NH₃) and sulfuric acid (H₂SO₄) at pH 10, is presented. The effect of air, oxygen, hydrogen peroxide...

... sulfide inclusion microchemistry molybdenum pitting sodium chloride stainless steel surface roughness It is known that the presence of manganese sulfide (MnS) inclusions on stainless steel (SS) provide sites for pit initiation, and the addition of Mo in SS enhances its corrosion resistance...

...). It is well known that MoO₂ forms on the Mo surface in acidic media. However, this MoO₂ film dissolves as molybdenum(V) oxytetrachloride ([MoOCl₄]^–), depending on the Cl^– concentration. ¹³ This dissolution decreased the amount...

... potential critical pitting temperature critical crevice temperature stainless steel localized corrosion molybdenum Nitrogen’s effect on the corrosion resistance of stainless steels (SS) has been well-documented. ^1-15 Higher amounts of N generally improve a steel’s resistance...

...P. Kritzer; N. Boukis; E. Dinjus Coupons of nickel, molybdenum, chromium, and the nickel-based Alloy 625 (UNS 06625) were corroded in strongly oxidizing hydrochloric acid (HCl) solutions at 350°C and a pressure (p) of 24 MPa, with reaction times between 0.75 h and 50 h. For Alloy 625, the effect...

...P.M. Natishan; J. Jones-Meehan; G.I. Loeb; B.J. Little; R. Ray; M. Beard Microbial colonization of metals (zirconium, chromium, niobium, tantalum, molybdenum, tungsten, and type 4340 steel [UNS G43400]) and susceptibility of these metals to microbiologically influenced corrosion by sulfate-reducing...

... chloride molybdenum chromium electrochemical tests films nickel passivation pitting seawater sodium chloride Mo is a well-known alloying element improving resistance of stainless steels to chloride attack. Early investigations have shown that Mo not only increases stability of the passive...