1.This paper introduces the solar selective absorbing surface preparation process by AC oxidation method on cold-rolled mildsteelplate. Its Solar absorptance a and thermal emittance e durability,ageing resistance to humidity have been tested and eva-luted.
2.2~# rock nitramon and petnaerythritoltetranitrate or trinitrotoluene explosive is used to weld aluminum upset plate and mildsteel base plate, the equation upset plate and explosive thickness can be deduced from Richter equation. It is effectual for being used in practice by example of analysis.
