Crack resistance of titanium alloy ATZ in sulfuric acid media

Translated from Khimicheskoe i Neftyanoe Mashinostroenie, No. 5, pp. 6–7, May, 1990.     

On limb radiance calculations and convergence of relaxation type retrieval algorithms

Several approaches to the solution of the radiative transfer equation assume either Curtis-Godson average or linear change of the source function across grid segments. When such solutions are used for calculating limb radiances, the peak radiance response to the source function perturbation at tangent point i is displaced down to the tangent point i+1. This effect is explained through a geometric argument. Temperature profile retrievals performed by applying the ratio of signals at level i+1 for correcting temperature at level i demonstrate dramatic convergence acceleration of the iterative relaxation scheme.     

Catalytic Effect of Ammonia on the Kinetics and Mechanism of MoO3 Dissolution in Alkaline Solutions

The effect of the ammonia concentration, pH, and temperature on the kinetics and mechanism of MoO₃ dissolution are analyzed based on the principles of heterogeneous kinetics. It is found that the rate of the limiting step is determined by the adsorption of the ammonium ion, which leads to the formation of an intermediate surface compound.     

Analysis of the Kinetics of Iron(II,III) Oxide Dissolution in Hydrochloric Acid Using a Generalized Delmon Model

A detailed analysis of the kinetics of iron(II, III) oxide dissolution in hydrochloric acid is performed using a generalized Delmon model, which takes into account changes in the fractal dimension of the surface of dissolving particles.