| abstract |
The invention discloses a metal corrosion prevention system suitable for the whole environment, belonging to the technical field of corrosion prevention materials, wherein the adopted metal corrosion inhibition additive contains a mixture of intrinsic polyaniline and secondary doped polyaniline, and can play a good corrosion prevention role in both acidic environment and alkaline environment; when the polyaniline is in a corrosive environment with pH less than or equal to 7, the eigenstate polyaniline can capture H in the environment and an anticorrosion system + So that protons enter the main chain of polyaniline to be electropositive, and to maintain electroneutrality, the counter anions in the doped acid system also enter the main chain of the polymer, and at the same time, H in the environment and in the system + Also can provide acidity required for synthesizing polyaniline; when the polyaniline is in a corrosion environment with the pH value larger than 7, the doped polyaniline is subjected to de-doping in an alkaline environment, tannin is released to anions, and eigenstate polyaniline is obtained, the eigenstate polyaniline can generate a passivation reaction with a metal material, a strict passivation film is formed at the contact position of metal and polyaniline, and the corrosion of the metal is slowed down. |