CN104845569A - Preparation method of wear-resistant toughened anticorrosive adhesive - Google Patents

Abstract

The invention discloses a preparation method of a wear-resistant toughened anticorrosive adhesive. The anticorrosive adhesive is a light grey viscous liquid, and is prepared from an epoxy resin (or polyurethane), vulcanized rubber, acetone (or xylene), a phenolic resin (or fatty acid diethylenetriamine), polyisobutylene, polymerized rosin, an antioxidant 1010 and mica iron oxide (alpha-Fe2O3) according to certain proportion. The novel anticorrosive adhesive has the advantages of high vertical attachment peel strength, water resistance, heat resistance, impact resistance, corrosion resistance and simple construction technique, can be cured to form a film at normal temperature, is suitable for corrosion resistance of steam condenser copper pipe ends and seepage prevention of copper pipe expanded openings, and can also be used for corrosion resistance and seepage prevention of similar equipment.

Description

A kind of preparation method of wear-resisting toughness reinforcing anticorrosive adhesive

Technical field

The present invention relates to a kind of preparation method of the anti-corrosion leak-proof material for condensing power plant's condenser.Specifically, a kind of preparation method of novel anticorrosion glue is related to.This anticorrosive adhesive, except the antiseepage for the anticorrosion of condenser copper tube pipe end and the swollen mouth of copper pipe, also can be used for the anti-corrosion leak-proof of similar devices.

Background technology

Condenser is part and parcel in generating set, and condenser, once there are quality problems, brings about great losses to the production of whole thermal power plant.Due to the singularity of condenser Working environment, condenser is caused in use easily to occur etching problem, the corrosion of condenser corrosion mainly its copper pipe, corrosion can cause equipment to be bored a hole revealing, and causes the erosion and encrustation of system, boiler and steam turbine before Boiler Furnace.The generation of the large-scale thermal power machine group corrosion accident of research discovery 38% is all directly caused by Steam Condenser Leak or self-corrosion.Therefore, applying anticorrosive adhesive prevents steam trap expanded tube joint leakage and Copper Tube Corrosion to be significant.

Domestic existing conventional antiseptic cement gum has phenolic mastic, epoxy mortar, furan mastic, fluorine carbon polymkeric substance and urethane etc.Single temperature environment (5 DEG C ~ 50 DEG C) from antiseptic cement gum work, the coating of almost all kinds can meet the demands.But phenolic mastic cohesive force is weak, impervious poor; Furan mastic curing cycle is oversize, and cure period takes more than 15 days; Fluorine carbon polymer elasticity is bad.In addition the water coolant in condenser usually containing the grains of sand (especially river), it have coating very strong to wash away, abrasive action.Therefore, from water tolerance, wear resistance, abrasion resistance and sticking power, snappiness, ambient cure angularly, mainly to consider with epoxy resin, urethane, for filmogen, to prepare novel anticorrosion glue.

Summary of the invention

Object of the present invention is exactly the preparation method of the novel anticorrosion glue in order to provide a kind of excellent property.For the anti-corrosion leak-proof of condenser copper tube pipe end, tube sheet is swollen mouth place and hydroecium.This antiseptic cement gum should have (1) resistive: should have larger resistivity, to prevent the galvanic corrosion between tube sheet and copper pipe; (2) snappiness: have good toughness, to digest, to absorb the surging force that eddy current and bubble produce; (3) temperature tolerance: the temperature variation that can stand Unit Commitment, load exception and seasonal law; (4) barrier properties: not because of the vibrations of copper pipe, flexible and occur the seepage at swollen mouth place; (5) sticking power: under the condition of common mechanical rust cleaning, has extremely strong sticking power with metallic matrix, and in the situations such as impact, temperature change, the physicochemical property of its coating remains unchanged, and phase undercoat keeps complete under arms; (6) wear resistance: the washing away of current, husky erosion and abrasion can be stood; (7) curing performance: can solidify quickly at normal temperatures.

For achieving the above object, the main technical schemes that the present invention takes is as follows:

Following material is selected, Homogeneous phase mixing under certain temperature and agitation condition according to certain component ratio (mass ratio):

Epoxy resin (or urethane): 25% ~ 65%

Acetone (or dimethylbenzene): 10% ~ 30%

Resol (lipid acid diethylenetriamine): 10% ~ 20%

Vulcanized rubber: 5% ~ 10%

Iron mica: 5% ~ 10%

Polyisobutene: 1% ~ 5%

Polymerized rosin: 0.5% ~ 3%

Antioxidant 1010: 0.5% ~ 3%

Above-mentioned epoxy resin or urethane are main film forming substance; Acetone or dimethylbenzene are thinner; Resol or lipid acid diethylenetriamine are solidifying agent; Vulcanized rubber is modifier; Polyisobutene is toughner; Polymerized rosin is tackifier; Iron mica is filler.

This novel anticorrosion glue property indices is under the prerequisite meeting national standard, and it is strong to have cohesive force, wear resistance and snappiness good, tension shock resistance is good, and curing cycle is short and resistance is large waits remarkable advantage.Meet the antiseepage under condenser operational conditions, requirement for anticorrosion completely, it solve a difficult problem for long-standing problem condenser copper tube expanded tube joint leakage and pipe end corrosion.

Specific features of the present invention is further illustrated in conjunction with example

Example one:

Epoxy resin: 30%

Acetone: 30%

Resol: 15%

Vulcanized rubber: 10%

Iron mica: 5%

Polyisobutene: 5%

Polymerized rosin: 2.5%

Antioxidant 1010: 2.5%

Prepare burden by above-mentioned formula, mixing, is stirred, is then extruded by extruder, obtain anticorrosive adhesive in stirrer.

Example two:

Urethane: 35%

Dimethylbenzene: 25%

Lipid acid diethylenetriamine: 15%

Vulcanized rubber: 10%

Iron mica: 5%

Polyisobutene: 5%

Polymerized rosin: 2.5%

Antioxidant 1010: 2.5%

Prepare burden by above-mentioned formula, mixing, is stirred, is then extruded by extruder, obtain anticorrosive adhesive in stirrer.

Claims (1)

1. a preparation method for wear-resisting toughness reinforcing anticorrosive adhesive, is characterized in that, the shared mass percent of this formula batching is:

Epoxy resin (or urethane): 25% ~ 65%

Acetone (or dimethylbenzene): 10% ~ 30%

Resol (lipid acid diethylenetriamine): 10% ~ 20%

Vulcanized rubber: 5% ~ 10%

Iron mica: 5% ~ 10%

Polyisobutene: 1% ~ 5%

Polymerized rosin: 0.5% ~ 3%

Antioxidant 1010: 0.5% ~ 3%.