Browse

Although the European Union’s directive about environment protection as WEEE and RoHS have been carried out in 2003, led solders are still in used in Serbia. In the aim to respect the European and world directives and laws, it is necessary to reduce a quantity of toxic element and to establish lead and cadmium free solders in production. In this paper it was presented lead-free alloys, which are used for ecological solders manufacturing and various applications. These are results in the frame of technology devel...

The distribution of the different forms of sulfur in the coal has been worked out. The goal of the present investigation was to fine out some distribution pattern of sulfur in this basin and to define the areas with high sulfur content.