For Corrosion under insulation is considered one of the largest and the most the most expensive problems for various industries. Annually, it costs many factories and industries a f fortune to build new systems.\nIn this paper a new method is provided to save the problem of corrosion. In addition to preventing corrosion problem, this method due to low thermal conductivity, can act as an insulator. Nano composite coatings are bared on standard of ASTM C-518 a very low coefficient of heat transfer and about 0.017 W/ MK. surfaces that is insulated by a designed cover includes 30 percent of water- based acrylic resin and 70 percent of SiO2 composite. This coating due to its special conditions and insulation directly sticks to the material and protect it. This coating has hydrophobic properties and prevents moisture to reach the surface of metals, pipes, vessels or other equipments. And as we know the main factor to create rust on the metals is humidity. Nano – composites which form coating thin film thickness are Hydrophobic. \nThus nano-coating insulation prevents from reaching moisture oil and gas transfer pipeline, also this type of insulation is semi-transparent. In the other hands, its space beneath is visible each time. In order to test this nano-coating, GM9540P test this has been approved as environmental corrosion test was used. After the first stage of test, the surface without coverage was corroded entirely, but the coated part was tested successfully without any effect of corrosion after 24 stages. Although there are numerous ways and materials to create resistance against corrosion, but insulation and anti corrosion properties aren’t considered synchronous; the coverage used in this test includes both properties

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