CN105295590A - Chemical anticorrosion teflon coating - Google Patents

Abstract

A chemical anticorrosion teflon coating is prepared from the following materials in parts by weight: 32 to 36 parts of silicon oxide sol, 10 to 16 parts of zirconia sol, 20 to 30 parts of teflon, 10 to 15 parts of epoxy resin, 10 to 15 parts of phenolic resin, 5 to 8 parts of kieselguhr, 5 to 10 parts of ultrafine ceramic powder, 5 to 10 parts of glass powder, 1 to 3 parts of carbon black, 20 to 30 parts of modified amine hardener, 10 to 20 parts of xylene, 10 to 20 parts of n-butyl alcohol and 1 to 3 parts of defoamer. The coating is used for chemical equipment inner wall anticorrosion, is convenient for construction, effectively resists the corrosion of strong corrosive exhaust gases (such as gases of SO2, NOx, HF and HCL) to a steel inner wall, and also effectively resists the corrosion of strong corrosive liquids (strong corrosive materials such as H2SO4, HCL and HF); meanwhile a paint film formed by the coating has higher abrasive resistance, temperature tolerance and heat and cold shock resistance.

Description

A kind of Chemical Preservation Teflon coating

Technical field

The application relates to technical field of coatings, especially relates to a kind of Teflon coating for Chemical Preservation.

Background technology

The equipment such as desulfurization fume tower, emission-control equipment are owing to being subject to SO ₂, NO _x, the gas such as HF, HCl corrosion, need often to carry out clearing up even changing parts.Domestic electric power, emtallurgy research design department, in order to overcome this corrosive attack, are seeking that a kind of cost is low, high temperature resistant, corrosion-resistant material always.But the coating cost of favorable anti-corrosion effect is very high, limits it and promotes the use of.

Summary of the invention

For the problems referred to above that prior art exists, the applicant provides a kind of Chemical Preservation Teflon coating.This coating is used for chemical industry equipment inner wall anti-corrosive, easy construction, not only effectively resists deep-etching flue gas (as SO ₂, NO _x, the gas such as HF, HCl) corrosion to steel inner wall, to effectively resisting strongly corrosion liquid (H ₂sO ₄, the strong corrosive material such as HCl, HF) corrosion, the paint film that this coating is formed simultaneously has very high wear resistance, temperature tolerance and cold-hot concussion property.

Technical scheme of the present invention is as follows:

A kind of Chemical Preservation Teflon coating, is made up of the raw material of following weight part:

Silica sol 32 ~ 36 parts; Zirconia sol 10 ~ 16 parts; Tetrafluoroethylene 20 ~ 30 parts; Epoxy resin 10 ~ 15 parts; 10 ~ 15 parts, resol; 5 ~ 8 parts, diatomite; Ceramic 5 ~ 10 parts; 5 ~ 10 parts, glass powder; Carbon black 1 ~ 3 part; Modified amine curing agent 20 ~ 30 parts; Dimethylbenzene 10 ~ 20 parts; Propyl carbinol 10 ~ 20 parts; Defoamer 1 ~ 3 part.

The technique effect that the present invention is useful is:

The present invention selects composite tackiness agent and modified firming agent as filmogen, and the cross-linking density between molecule increases, and substantially increases the erosion resistance of matrix resin.Product of the present invention selects the functional fillers such as silica sol, zirconia sol, ceramic, produces mutually synergy, forms fine and close cancellated coating, coating and basal body binding force are strengthened, make its Thermal Synthetic mechanical property and matrix phase close.Give wear resistance, thermotolerance, sticking power that paint film is superpower, impermeabilisation is good, makes paint film have long-effective corrosion, H in opposing flue gas ₂the dielectric corrosions such as S, SO2, NO.The present invention has well wear-resisting, acid-resistant corrosion (40%H ₂sO ₄₎, high temperature resistant (long-term heatproof 160 DEG C, short-term heatproof 250 DEG C).

Embodiment

Embodiment 1

A kind of Chemical Preservation Teflon coating, is made up of the raw material of following weight part: silica sol 36 parts; Zirconia sol 16 parts; Tetrafluoroethylene 30 parts; Epoxy resin 15 parts; 15 parts, resol; 8 parts, diatomite; Ceramic 10 parts; 10 parts, glass powder; Carbon black 3 parts; Modified amine curing agent 30 parts; Dimethylbenzene 20 parts; Propyl carbinol 20 parts; Defoamer 3 parts.

Embodiment 2

A kind of Chemical Preservation Teflon coating, is made up of the raw material of following weight part: silica sol 32 parts; Zirconia sol 10 parts; Tetrafluoroethylene 20 parts; Epoxy resin 10 parts; 10 parts, resol; 5 parts, diatomite; Ceramic 5 parts; 5 parts, glass powder; Carbon black 1 part; Modified amine curing agent 20 parts; Dimethylbenzene 10 parts; Propyl carbinol 10 parts; Defoamer 1 part.

Embodiment 3

A kind of Chemical Preservation Teflon coating, is made up of the raw material of following weight part: silica sol 35 parts; Zirconia sol 13 parts; Tetrafluoroethylene 25 parts; Epoxy resin 12 parts; 12 parts, resol; 6 parts, diatomite; Ceramic 7 parts; 8 parts, glass powder; Carbon black 2 parts; Modified amine curing agent 25 parts; Dimethylbenzene 15 parts; Propyl carbinol 15 parts; Defoamer 2 parts.

Claims (1)

1. a Chemical Preservation Teflon coating, is characterized in that being made up of the raw material of following weight part:

Silica sol 32 ~ 36 parts; Zirconia sol 10 ~ 16 parts; Tetrafluoroethylene 20 ~ 30 parts; Epoxy resin 10 ~ 15 parts; 10 ~ 15 parts, resol; 5 ~ 8 parts, diatomite; Ceramic 5 ~ 10 parts; 5 ~ 10 parts, glass powder; Carbon black 1 ~ 3 part; Modified amine curing agent 20 ~ 30 parts; Dimethylbenzene 10 ~ 20 parts; Propyl carbinol 10 ~ 20 parts; Defoamer 1 ~ 3 part.