Method of corrosion protection of reservoirs, tanks and containers

 

(57) Abstract:

When corrosion protection of tanks, tank containers and put reinforced epoxy. The method can be used for the construction, repair or reconstruction of the latter. Epoxy reinforced floors are made primer, adhesive and impregnating layers containing epoxy resin ED-20, polyethylenepolyamine, a reinforcing layer of fiberglass or fiberglass, coating layers containing epoxy resin ED-20, polyethylenepolyamine and a filler, and primer, adhesive and coating layers additionally contain a resin oxilan -5(6), aminophenolic hardener and toluene. As filler coating layers contain aluminum powder and talc powder. The combination of components in a certain ratio provides high plasticity, no cracks and highly effective protection from corrosion. table 1.

The invention relates to the field of corrosion protection of tanks, cisterns and containers by applying a reinforced epoxy coatings and can be used in the construction, repair or reconstruction of the latter.

There is a method of corrosion protection of tanks, cisterns and the coatings. - Ed. 2nd, revised and expanded-M.: Chemistry, 1978, S. 83-84) by coating based on epoxy resins. The coating consists of a primer, coating and finishing layers in the following ratio, wt.h.:

primer:

Epoxy resin ED-20 or ED-16 - 100

The polyethylenepolyamine - 10 - 12

Styrene - 18 - 20

Mica flour - 10 - 12

Carbon black is white - 3 - 5

surface layer:

Primer

the layer of reinforcing material impregnated with resin ED-20 or ED-16

the finishing layer:

Epoxy resin ED-20 or ED-16 - 100

The polyethylenepolyamine - 10 - 12

Styrene - 18 - 20

Mica flour - 10 - 12

As a reinforcing material using glass, cotton or other fabric, and staple glass fibers.

The disadvantage of this method of protection of reservoirs, tanks and containers from corrosion is small, the service life caused by this method of coating due to its lack of plasticity, resulting in seasonal deformation of the tank or other metal in it can develop cracks, which reduces the efficiency of corrosion protection.

The closest technical solution to savsat corrosion of structures and technological equipment. - L.: Stroiizdat. Leningrad Department, 1988-S. 28, option 1, S. 38, table 6, cipher System OP-32 Marm) by applying reinforced epoxy coating consisting of a primer, adhesive, impregnation layers, 1-2 layers of reinforcing material and two covering layers, in the following ratio, wt.h.:

primer, adhesive and impregnating layers:

Epoxy resin ED-20 - 100

Dibutyl - 10 - 12

The polyethylenepolyamine - 12

reinforcing layers:

fiberglass or fiberglass

top layers:

Epoxy resin ED-20 - 100

Dibutyl - 10 - 12

The polyethylenepolyamine - 12

Powdery filler (andesite flour, graphite, and so on) - 33 - 45

The disadvantage of the prototype is small, the service life caused by a known method for coating because of its propensity to aging under the action of liquid media due to the gradual leaching of the plasticizer, which leads to the formation of cracks in the coating and reduces the efficiency of corrosion protection.

The invention solves the technical problem of improving the protection of reservoirs, tanks and containers from corrosion, improve the service life of the coating by preventing the formation of cracks.

Specified is anesini reinforced epoxy coating, consisting of primer, adhesive and impregnating layers containing epoxy resin ED-20, polyethylenepolyamine, a reinforcing layer of fiberglass or fiberglass, coating layers containing epoxy resin ED-20, polyethylenepolyamine and a filler according to the invention a primer, adhesive, impregnating and coating layers additionally contain a resin oxilan-5(6), aminophenolic hardener AF-2 and toluene in the following ratio, wt.h. for primers, adhesives and impregnating layers:

Epoxy resin ED-20 - 86 - 90

Resin oxilan-5(6) - 10 - 14

The polyethylenepolyamine - 8 - 10

Aminophenolic hardener AF-2 is 2.5 - 3.5

Toluene - 10 - 25,

and coating layers of these components contain the following ratio, wt.h.:

Epoxy resin ED-20 - 86 - 90

Resin oxilan-5(6) - 10 - 14

The polyethylenepolyamine (Pepa) - 8 - 10

Aminophenolic hardener AF-2 is 2.5 - 3.5

Toluene - 10 - 25

Filler - 90 - 120

moreover, the filler used aluminum powder and talc powder in the following ratio, wt.h.:

Aluminum powder - 10 - 20

Talc powder - 80 - 100

Epoxy composition for primer, adhesive, impregnating) the situation room temperature.

Resin oxilan-5(6) THE 6-02-1376-87 is horapollo aliphatic trifunctional epoxy resin with an epoxy number of 68%.

An example of retrieving a primer, adhesive, impregnating layers. The vessel loaded epoxy resin ED-20 (88 wt.h.), the resin oxilan-5(6) (12 wt.h. ), toluene (15 wt.h.), then add the AF-2 (3 wt.h.) and polyethylenepolyamine (9 wt.h.).

Upon receipt of epoxy compositions for coating layers before the introduction aminophenols hardener (AF-2) and polyethylenepolyamine (PEPA) in a vessel load of aluminum powder (15 wt.h.) and talc (90 wt.h.). The introduction of each component is carried out with thorough stirring, normal pressure and room temperature. The obtained composition layer applied to the inner surface of reservoirs, tanks and containers.

The method is as follows.

To clean from rust, scale and fat surface applied consistently primer and adhesive layers with drying every day at room temperature (but not nigeoC). Then apply an impregnating layer and nedosushennye impregnating the layer of paste with a rolling rollers fiberglass or a fiberglass mesh in 1-2 layers, after visich the Total thickness of the coating is not less than 1000 microns. Before commissioning is an extract of the product for at least 10 days.

The test results of the proposed reinforced epoxy coating and its mechanical and physical-chemical properties are shown in the table.

The table shows that the proposed reinforced epoxy coating has a higher ductility compared to the prototype, which ensures the safety of it when applied to the inner surface of the tank for a long period of time and increases the efficiency of corrosion protection.

The invention meets the criterion of "industrial applicability", as proposed for the application in this way reinforced epoxy coating meets all the requirements for epoxy coatings for tanks, tanks and containers and can also be used for corrosion protection of pipelines, construction of structures and other equipment.

Method of corrosion protection of tanks, cisterns and containers by applying a reinforced epoxy coating consisting of a primer, adhesive and impregnating layers containing epoxy resin ED-20, polyethylenepolyamine, Armey who lenpolimer and a filler, characterized in that the primer, adhesive, impregnating and coating layers additionally contain a resin oxilan-5(6), aminophenolic hardener AF-2 and toluene in the following ratio of components for primer, adhesive and impregnating layers, wt.h.:

Epoxy resin ED-20 - 86-90

Resin oxilan-5(6) - 10-14

The polyethylenepolyamine - 8-10

AF-2 IS 2.5 - 3.5

Toluene - 10-25

and in the top layers of the filler is a mixture of 10-20 wt.h. aluminum powder and 80-100 wt.h. talc ground in the following ratio of components in layers, wt.h.:

Epoxy resin ED-20 - 86-90

Resin oxilan-5(6) - 10-14

The polyethylenepolyamine - 8-10

AF-2 IS 2.5 - 3.5

Toluene - 10-25

Filler - 90-t

 

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