Forming method of thermal insulation film and internal combustion engine
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United States of America Patent
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Aug 20, 2019
Grant Date -
Jun 30, 2016
app pub date -
Dec 18, 2015
filing date -
Dec 26, 2014
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Abstract
A forming method of a thermal insulation film includes a first step of forming an anode oxidation coating film on an aluminum-based wall surface, the anode oxidation coating film including micro-pores each having a diameter of micrometer-scale and nano-pores each having a diameter of nanometer-scale; and a second step of coating a surface of the anode oxidation coating film with a sealant containing filler to seal at least part of the micro-pores and the nano-pores by the sealant so as to form the thermal insulation film.
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