To provide a process saving anticorrosion method of weather-resistant steel, which retains long term corrosion and weather resistant properties and further allows optional tinting.
An anticorrosive coating film, which contains particles of a metal selected from a group comprising aluminum, zinc and alloys thereof, is formed on a weather-resistant steel surface. Then a coating film, which contains (1) an organic-inorganic compound resin and (2) a coloring agent, is formed on it. The organic-inorganic compound resin (1) is obtained by hydrolytic condensation of; a hydrolysable group bearing epoxy resin, and an organosilane represented by a generic formula (1): R1nSi(OR2)4-n or a partial hydrolytic condensate of the organosilane. Said hydrolysable group bearing epoxy resin is obtained by reacting an epoxy resin (component a) and an organic silicon compound (component b); wherein the component a has one or more epoxy groups in a molecule, and the component b has an amino group capable of reacting with the epoxy group and a hydrolysable group bonded directly to silicon atom.
AOKI RYUICHI
TAKI TORU
SASAKI HIROJI
TANABE HIRONARI
Fumiaki Otsuka
Sadao Kumakura
Shishido Kaichi
Nobuo Ogawa
Takaki Nishijima
Atsushi Hakoda
Kenji Asai