STI Group supplies solutions for all sectors in the energy technology field, covering fossil fuels and nuclear through to renewable fuels. For example, the coal flow control valves used in coal power stations are treated with highly wear-resistant thermal spray coatings. Pump shafts for nuclear power stations are chromium-plated to the strictest quality requirements and turbine shafts and guide vanes for hydropower stations are repaired by applying repair layers. For the exact proof of quality regarding the individual layers, STI Group offers numerous tests such as micrographs, crack testing and other recognised methods, including the respective reports and certificates. These tests are carried out by specialist engineers or in the STI Group's research and development laboratory.