The objective of the present work is to present to the international scientific community the conception of an estimation method of the simple ionization energy, indispensable for the establishment of the thermal plasma needed for covered electrode welding. Starting from the synthesis and the analysis of experimental and theoretical results established in the specialized literature, it was deduced a method for estimating the invested energy in the ionization process of determinate percentage of the disassociated elements component of the heterogeneous gas (resulting of the decomposition of the coating mass), in the time unit, in function of the temperature. The effectiveness of the coating electric function make possible the development of the metallurgic and operatives functions of the electrode, depending on the physical and chemical properties of the coating materials and their relative concentrations. The determination of the exact proportions of the components of the mixtures integrating the covered electrode coatings constitutes an important technologic challenge for manufacturers, because of the chemical composition differences of the raw material and the necessity of minimization of the product cost benefit relation. An appropriate electric stability of the process is essential for obtaining an optimal quality of the welded union.
Estimation; Potential of ionization; Coating composition; Electric function; Grade of ionization
