Corrosion and passivation of molybdenum-bearing alloys

  • 4.54 MB
  • English
StatementXiaofan Yang.
ContributionsUniversity of Surrey. Department of Material Science and Engineering.
ID Numbers
Open LibraryOL19353880M

Corrosion of low-temperature nitrided molybdenum-bearing stainless steels. Critical survey of the S-phase surface engineering of stainless steels, Co–Cr alloys and Ni–Cr alloys is presented in Survey of the literature on the effect of nitrogen on corrosion and passivation of stainless steels can be found in a book and in Cited by: 7.

The effect of replacing molybdenum with vanadium, both fully and partially, on the corrosion resistant properties of wrought ferritic, and wrought and cast austenitic stainless steels is examined.

All alloys contained approximately 18% chromium with the austenitic alloys based on Types L and CF–8 : R.D. Davies, C.J. Gross, P. van Biljon, F.P.A. Robinson.

ASTM's corrosion and wear standards provide the appropriate procedures for carrying out corrosion, wear, and abrasion tests on specified metallic materials and alloys.

These tests are conducted to examine and evaluate the behavior, susceptibility, and extent of resistance of certain materials to stress corrosion cracking, cavitation erosion. The Effect of Microstructure on Corrosion of Molybdenum-Bearing Titanium Alloys in High Chloride and Acidic Solution at High Temperature S.

Tamilselvi 1), Cited by: 7. The corrosion behavior Corrosion and passivation of molybdenum-bearing alloys book nickel (Ni)-based alloys used for low-temperature aqueous or condensed systems is reviewed in detail in this paper. Commercially available pure Ni, nickel-copper (Ni-Cu), nickel-molybdenum (Ni-Mo), nickel-chromium-molybdenum (Ni-Cr-Mo), and nickel-chromium-iron (Ni-Cr-Fe) alloys as well as cast Ni-based alloys are Cited by: 3.

Sm aqueous-corrosion-book 1. Contents Corrosion Problems and Alloy Solutions 1 Corrosion-Resistant Alloys from the Special Metals Group of Companies 4 Alloy Selection for Corrosive Environments 11 Corrosion by Acids 12 Sulfuric Acid 12 Hydrochloric Acid 17 Hydrofluoric Acid 20 Phosphoric Acid 22 Nitric Acid 25 Organic Acids 26 Corrosion by Alkalies.

Corrosion of Impure Metals and Single-phase Alloys Many of the forms of corrosion already discussed have been caused or affected not only by metallurgical structure but also by the segregation of impurities or alloying additions to dislocations, grain boundaries, precipitates, etc.

These include lap splice joints of aging military aircraft, stress-corrosion cracks in titanium and aluminum alloys, crevice corrosion sites on stainless steels, and coating defects on aluminum. Molybdenum is a chemical element with the symbol Mo and atomic number The name is from Neo-Latin molybdaenum, from Ancient Greek Μόλυβδος molybdos, meaning lead, since its ores were confused with lead ores.

Molybdenum minerals have been known throughout history, but the element was discovered (in the sense of differentiating it as a new entity from the mineral salts Pronunciation: /məˈlɪbdənəm/ ​(mə-LIB-dən-əm).

Localized Corrosion Study of Ni-Cr-Mo Alloys for Oil and Gas Applications Ajit Mishra 1, Danielle Richesin 1 and Raul B. Rebak 2 1 Haynes International, Inc. Abstract. This specification covers the standard practices for detecting susceptibility to intergranular attack in austenitic stainless steels.

These practices include five intergranular corrosion tests, namely: (1) oxalic acid etch test for classification of etch structures of austenitic stainless steels; (2) ferric sulfate-sulfuric acid test, (3) nitric acid test and (4) copper-copper. Titanium (Ti) alloys are widely used for structural applications, for example, in the chemical plants and the oil production industries.

The vast utilization of titanium and its alloys own to their excellent mechanical property and high corrosion resistance (Ref 1).However, Ti is susceptible to the corrosion attack when exposed to environments containing high level acidic Cited by: 3.

On the basis of investigations carried out by the authors of, it was concluded that molybdenum-bearing alloys are more active in the hydrogen evolution reaction in alkaline medium than tungsten-bearing alloys. When investigating the properties of Ni-Mo, Ni-W, Co-Mo, and Co-W alloys, it was also found that cobalt alloys show a higher catalytic Cited by: 1.

corrosion of metals and alloys - accelerated corrosion test for intergranular corrosion susceptibility of austenitic stainless steels: sae as hose assembly ptfe heavy duty, to degrees f ( to degrees c) psi ( kpa) hydraulic and pneumatic: sae as.

The pitting corrosion resistance and passive behavior of type borated stainless steels (Febalance–18Cr–12Ni–Mn–(,and wt %)B) manufactured through conventional ingot metallurgy were investigated.

The alloys were composed of an austenitic matrix and Cr2B phase, and the volume fraction of Cr2B increased from to vol % as the B content Cited by: 2. Molybdenum is also valued in steel alloys for its high corrosion resistance and weldability.

[37] [39] Molybdenum contributes corrosion resistance to type stainless steels (specifically type) and especially so in the so-called superaustenitic stainless steels (such as alloy AL-6XN, SMO and hMo). Molybdenum increases lattice.

GENERAL PROPERTIES Types (UNS S), L (S), (S) and L (S) are molybdenum-bearing austenitic Tampa Bay Steel - and L Stainless Steel Both and L stainless steel provide an in which molybdenum content increases to 3 to 4% from the 2 to 3% found in and L. Crevice corrosion.—L is highly susceptible to crevice corrosion attack as compared to the other implant alloys.

31 The occurrence of corrosion on the bone plate and screws made of L at the interface between the screw heads and the countersink holes is a common feature.7, 16 Galvanic corrosion.—While reports in the literature.

B Standard Test Method for Ammonia Vapor Test for Determining Susceptibility to Stress Corrosion Cracking in Copper Alloys; B()e1 Standard Practice for De-Agglomeration of Refractory Metal Powders and Their Compounds Prior to Particle Size Analysis; B Standard Specification for Zinc Master Alloys for Use in Hot Dip Galvanizing.

As little as % ferric ion may increase the corrosion rate of an alloy by an order of magnitude. 22 >20 mpy INCOLOY alloys and MO normally offer (> mm/a) less resistance to corrosion by phosphoric acid than for nickel-based alloyand alloy MO is generally less resistant alloys.

September (No. 9) Corrosion of Titanium in Sulfuric Acid and Chlorine, L.W. Gleekman. 21 Review: Gas Condensate Well Corrosion Problem, D.R. Fincher. 23 Corrosion Resistance of Titanium Alloys Compared with Commercially Pure Titanium, D.

Schlain, C.B. Kenahan. 25 Effect of the Concentration of Various Salts on the Dissolution of.

Description Corrosion and passivation of molybdenum-bearing alloys FB2

Zinc Alloys Zinc can be deposited electrolytically with small amounts of cobalt, nickel, iron or manganese to give increased corrosion resistance above that of the pure zinc coating. Flow assisted corrosion is defined as the combined action of corrosion and fluid flow.

Types The types of velocity phenomena we will discuss are: 1. Erosion-corrosion 2.

Download Corrosion and passivation of molybdenum-bearing alloys FB2

Impingement 3. Cavitation 1- Erosion-Corrosion Description Erosion-corrosion occurs when the velocity of the fluids sufficient to remove protective films from metal surface.

The Effect of Microstructure on Corrosion of Molybdenum-Bearing Titanium Alloys in High Chloride and Acidic Solution at High Temperature S.

Tamilselvi, T. Nishimura, X. Min and K. Tsuzaki National Institute for Materials Science (NIMS), TsukubaJapan. Grade is the standard molybdenum-bearing grade, second in importance to amongst the austenitic stainless steels.

Details Corrosion and passivation of molybdenum-bearing alloys EPUB

The molybdenum gives better overall corrosion resistant properties than Gradeparticularly higher resistance to pitting 3/5(1). astm stp symposium on intergranular corrosion of stainless steel. Inspection manual for piping 1. Page 1 of 2. Page 2 of 3.

Page 3 of 4. PIPING MANUAL INDEX Sl. Topics Page No. Scope 6 Definition 7 Pipe 7 Tubing 7 Type of Pipes According to the Method of Manufacture 8 Electric Resistance Welded Pipe (ERW) 8 Furnace Butt Welded Pipe 8 Electric Fusion Welded Pipe.

Protection of Austenitic Stainless Steel and Other Austenitic Alloys from Polythionic Acid Stress Corrosion Cracking during Shutdown of Refinery Equipment General If sulfide corrosion products are present on the surfaces of austenitic stainless steel and other austenitic alloy process equipment, there is a definite risk of polythionic.

Part Structural Fire Design, BSI British Standards Institution () BS EN Metallic and Other Inorganic Coatings — Thermal Spraying — Zinc, Aluminium and their Alloys, BSI British Standards Institution () BS EN IS0 Mechanical Properties of Corrosion-Resistant Stainless Steel Fasteners. The AlloysL, and H are the most susceptible of the austenitic stainless steels to stress corrosion cracking (SCC) in halides because of their relatively low nickel content.

Conditions which cause SCC are (1) presence of halide ions (generally chloride), (2) residual tensile stresses, and (3) temperatures in excess of about °F. A metal which resists corrosion—hence it is used for plating and in stainless steels and other corrosion-resistant alloys.

Cobalt Co Used chiefly in permanent magnets and in high-speed steel. Copper Cu Full text of "R. A. Higgins ENGINEERING METALLURGY Part I APPLIED PHYSICAL METALLURGY" See other formats.List of ASTM International standards explained.

This is a list of ASTM International rd designations usually consist of a letter prefix and a sequentially assigned number. This may optionally be followed by a dash and the last two digits of the year in which the standard was adopted.