Method for the interior reflective coating of glass tubes, in particular for solar collectors

摘要

Process for forming reflecting surface on glass tube comprises: sealing both ends of tube; placing in a horizontal position; introducing sensitizer solution to partially fill the inner space; removing the solution after a certain time; introducing a reflecting solution into the inner space so that the whole of the inner surface of the tube is wetted; and removing the consumed reflecting solution. Preferred Features: The glass tube is preheated before being treated and rinsed with different solutions between treatments. The inner space of the tube is dried with hot air after the reflecting solution has been applied. The sensitizer solution is applied for 1-6, preferably 10-30 seconds. The reflecting solution is applied for 2-5 minutes.