The Influence of Thermal Shock on Zn-Ni Surface in the Automobile Industry

The aim of this research is, to investigate the influence of thermal shock on parts surface treated with galvanizing. On the chosen components was performed the method Zn-Ni surface treating on bath line. After the surface treatment the components were embedded in to the thermal shock chamber, where was performed a thermal shock examination. In the upper chamber had been set plus 180 degrees Celsius, in the bottom chamber minus 30 degrees Celsius. The components were disposed 15 minutes in the upper chamber and 15 minutes in the bottom. The transition between the upper warm chamber and the bottom cold chamber is provided by leading spindle system. Therefore the duration of one cycle was 30 minutes, and the duration of complete examination was 300 cycles, i.e. 150 hours. The research showed that the chosen thermal shock has no influence on the surface treatment.