Detail Publikasi
Abstrak
The adsorption of reactants by a catalyst (solid) in a heterogeneous catalyst flowing in a gaseous medium or in solutions was calculated. In thermodynamic functions, adsorption is accompanied by a decrease in the standard free energy of Gibbs because it is a spontaneous process. Therefore, it is accompanied by a decrease in entropy and enthalpy The free energy values at temperatures (293, 303, 313, 323) were (58.286, 53.746, 55.846, 57.066) respectively. The free energy, enthalpy and entropy were also calculated from the Capps relationship, using the equilibrium constants with temperature. The values of corrosion rate and surface coverage ratio (ᶿ) were calculated in (0.1M) sulfuric acid in the absence of inhibitors. The values of corrosion and ratio (ᶿ) at a temperature of (300 K) were (12.08, 9665-10×) respectively,and Each metal has a certain number of active centers, which results in the amount( ᶿ), which represents the center covered by molecules through chemical adsorption. The gravimetric method is also used, where vacuum devices are used, including balances, and the measurement is carried out by weighing the adsorption surface (0.0000000001) g of the substance. A corrosion cell is also used to protect the metal, where anode-type electrodes are used, made of a metal more active than the metal to be protected. The corrosion cell consists of an anode, a cathode, an electrolyte, and a salt bridge.