Corrosion Of Molybdenum Research Articles

Inhibition effect of glycine on molybdenum corrosion during CMP in alkaline H2O2 based abrasive free slurry

The inhibitory effect of glycine on corrosion and chemical mechanical polishing (CMP) of Mo in hydrogen peroxide (H2O2) based abrasive-free alkaline slurry has been investigated. Results show that, in H2O2 based slurry, both static etching rate (SER) and removal rate (RR) of Mo during chemical mechanical polishing were reduced by adding glycine and the inhibition efficiency was around 50%. From ex-situ and in-situ open circuit potential (OCP), current density transient and potentiodynamic polarization measurements, it is found that formation of oxides was delayed due to blocked contact between oxidizer and the sample surface by electrostatic adsorption of glycine zwitterion on the surface. Glycine can form complex with MoO3 and promote dissolution of surface oxide, MoO3, resulting in a reduced passivation layer. The slowed oxidation reaction dominates the whole process, resulting inhibited Mo corrosion and leading to a smoother Mo surface.

Corrosion Behavior of Molybdenum in Molten Aluminum

Corrosion of molybdenum in molten aluminum was investigated by static immersion tests. The layer formed between aluminum and molybdenum was consist of Al4Mo at 700°C, Al8Mo3 at 750°C, Al4Mo and Al8Mo3 at 800°C range for periods varying from 8 to 120 h . The intermetallic layer broke up as long as it grew due to thermal stresses and dispersed in the molten aluminum. The weight-loss of molybdenum varied linearly with time. The corrosion rate increased with temperature and the activation energy was nearly 88.4 kJ mol-1.

Electroless Nucleation and Growth of Cu–Se Phases on Molybdenum in Cu(II)–In(III)–Se(IV) Solutions

Surface reactions of molybdenum-covered glass plates, used as back contact for thin Cu(In,Ga)(S,Se) 2 solar cells, are examined at open circuit in acidic electrolytes used for plating CuInSe 2 layers. A multinary element cementation reaction occurs, leading to the corrosion of molybdenum and the formation of CuSe x electroless deposit (x from 0.2 to 0.8), with well-defined compositions. Immediately after immersion, small nuclei appear on the surface, which then grow to form a quasi-continuous layer. The time evolution of the open-circuit potential of Mo and the Se/Cu surface atomic ratio are correlated and are in agreement with thermodynamic data predictions.

Corrosion of Molybdenum in Aqueous Media

Abstract This study focuses on the corrosion of Mo in acidic media (sulfuric acid [H2SO4] and hydrochloric acid [HCl]). The effect of the electrode pretreatment was investigated by testing the electrode at different cathodic potentials. The effect of propargyl alcohol (an effective inhibitor for Fe alloys) on the corrosion of Mo was examined. The reduction and oxidation potentials of Mo in these media and the amount of charge passing through the circuit, depending on the pretreatment and the composition of the solutions studied, were also determined.

Corrosion of Molybdenum - Containing Amorphous Iron Alloys

Corrosion of Molybdenum - Containing Amorphous Iron Alloys

モリブデンの水溶液中腐食に対する抑制剤

モリブデンの水溶液中腐食に対する抑制剤

The corrosion of molybdenum and tungsten in liquid sodium

The corrosion of molybdenum and tungsten has been examined in static and dynamic liquid sodium. Corrosion of molybdenum was not found to be oxygen dependent; no ternary oxide corrosion products were observed. Inclusion of labile carbon into the system containing molybdenum caused the formation of molybdenum carbide, Mo 2C, which was identified by its powder X-ray diffraction pattern. The corrosion of tungsten was found to be strongly influenced by the initial concentration of dissolved oxygen in the liquid metal; at low oxygen levels in the dynamic system the cubic phase, Na 3WO 4 ( a 0 = 4.62 A ̊ ), was identified by its X-ray diffraction pattern recorded through a matrix of sodium, whereas, at initially very high oxygen levels in static systems, the orthorhombic phase, Na 6WO 6, was identified. The solid-state interaction of sodium oxide with molybdenum and tungsten metals under vacuum give the ternary phases Na 4MoO 5 and Na 6WO 6, respectively, together with unreacted refractory metal and sodium vapour.

Ellipsometric Investigation of Corrosion of Deposited Thin Molybdenum Film

The corrosion behavior of molybdenum film was investigated in deionized water and moisture using ellipsometry. The corrosion film on molybdenum formed in deionized water was explained by a single layer model. The corrosion rate greatly depended on the content of oxygen in doionized water and the corrosion did not saturate with time. The corrosion film in moisture was not explained by a simple single layer model in the beginning of the corrosion. Ellipsometric parameter Ψ changed abnormally. The corrosion surface was considered to consist of a mixture of corrosion island and molybdenttm. These fractional volumes were calculated using Lorenz-Lorentz equation. From the change of the volumes, it was found that the corrosion of molybdenum in moisture was composed of three steps, i. e., corrosion island nucleation, corrosion island growth in the surface and corrosion film growth.

Corrosion of Molybdenum by Molten Glasses

Corrosion of Molybdenum by Molten Glasses

Electrical Resistance Measuring Device Plus Statistical Analysis Yield Unique Approach to Corrosion Problems

Abstract A new technique for analyzing electrical resistance measuring device data is described. A 5 percent chromium, 1/2 percent molybdenum corrosion probe was used to measure corrosion rates in ...