Filing Date: 1995-12-28.The invention discloses a process for producing coatings of various oxides by using the sol-gel method and the technics of immersion and spraying on silver coatings and substrates. Said process provides for the preparation of coatings of various compositions, vitreous or polycrystalline, and which have an excellent homogeneity, high adherence and good mechanical and thermal compatibility with the metal substrate. Said coatings result in an efficient barrier against dry oxidation at high temperature. It is a simple and economical process which is applicable to multiple forms and sizes of substrates, which may be used in multiple applications when highly reflectant materials are required such as solar reflectors, lighting screens, etc.Peer reviewed