Two-step Initiation Theory of Pitting Corrosion in Passive Metals

Pitting Corrosion of Metals A Review of the Critical Factors

Pitting corrosion is localized accelerated dissolution of metal that occurs as a result of a breakdown of the otherwise protective passive film on the metal surface. This paper provides an overview of the critical factors influencing the pitting corrosion of metals. The phenomenology of pitting corrosion is discussed, including the effects of alloy composition, environment, potential, and tempe...

Pitting Corrosion Monitoring Using Acoustic Emission

Numerical Study of Blast Initiation of Detonation Using a Two Step Chemical Kinetics Model

The effect of chemical reactions on the blast initiation of detonation in gaseous media has been investigated in this paper. Analytical method is based on the numerical solution of onedimensional reactive Euler equations. So far, analyses on the blast initiation of detonation have modeled the combustion process as a one-step chemical reaction, which follows the Arrhenius rate law. Previous stud...

VIII-Metals-J-Corrosion protection-1_ CORROSION PROTECTION OF METALS

Nearly all metals, with the exception of gold and platinum, will corrode in an oxidising environment forming compounds such as oxides, hydroxides and sulphides. The degradation of metals by corrosion is a universal reaction, caused by the simple fact that the oxide of a metal has a much lower energy than the metal itself. Hence there is a strong driving force for the oxidation of metals. For ex...

Anodic Photocurrents and Corrosion Currents on Passive and Active-Passive Metals

A photoelectrochemical study was made to compare Zr, Ti, Zn, Sn, Fe, and Cu in 1 N sulfuric acid and/or 1 N KOH. This group includes spontaneously passive, active-passive, and nonpassive metals. The apparent direct and indirect bandgaps and the flatband potentials were measured for the anodic oxides of each metal. (The bandgaps and flat-band potentials can be used to identify the anodic oXide.)...