Method for suppressing corrosion under heat-insulating material, and paste for suppressing corrosion under heat-insulating material
A method for suppressing corrosion under insulation includes a step of applying a paste containing aerogel particles and a liquid medium to a target surface to form a coating film. A paste for suppressing corrosion under insulation contains aerogel particles and a liquid medium.
1. A method for suppressing the corrosion of a pipe under insulation, comprising a step of applying a paste comprising aerogel particles, a liquid medium, a binder resin, and a fibrous substance to a surface of the pipe to form a corrosion-resistant coating film thereon,
wherein the binder resin comprises a first binder resin and a second binder resin having a lower solubility to the liquid medium than the first binder resin, and the first binder resin is a cellulose-based resin or an acrylic acid-based resin, and
wherein the content of the fibrous substance is 5 parts by mass or more and 25 parts by mass or less, with respect to 100 parts by mass of the aerogel particles.
2. The method according to claim 1 , wherein the content of the aerogel particles is 5% by mass or more based on the total amount of the paste.
3. The method according to claim 1 , wherein the liquid medium is a water-based solvent containing water.
4. The method according to claim 1 , wherein the content of the second binder resin is greater than the content of the first binder resin.
5. The method according to claim 1 , wherein the aerogel particles have hydrophobicity.
6. The method according to claim 1 , wherein the fiber diameter of the fibrous substance is 0.01 to 100 μm.
7. The method according to claim 1 , wherein the second binder resin is a thermoplastic resin.
8. The method according to claim 7 , wherein the second binder resin is an acrylic resin.
9. The method according to claim 1 , wherein the second binder resin is a thermosetting resin.
10. The method according to claim 9 , wherein the second binder resin is a silicone resin.
11. The method according to claim 1 , wherein the content of the fibrous substance is 7 parts by mass or more and 20 parts by mass or less, with respect to 100 parts by mass of the aerogel particles.
12. The method according to claim 1 , wherein the content of the fibrous substance is 9 parts by mass or more and 15 parts by mass or less, with respect to 100 parts by mass of the aerogel particles.