CS230947B1 - Corrosion protection of steel equipment and structures - Google Patents

Abstract

The aim of the invention is to protect steel structures from corrosion. The aim was achieved by the method according to the invention, where a layer of cement-cement layer consisting of 95 parts of cement and 3 to 5.5 parts of cement is first applied to the steel structure, onto which, after hardening, a resin based on furfural or furfuryl alcohol is applied.

Description

The invention relates to a method of protecting steel equipment and structures against corrosion.

In general, very good resistance of uranium resins to water, acids, hydroxides, gasoline and the like is known and is therefore used to protect against these substances. Their disadvantage is poor adhesion to metals and therefore their applicability is limited only to devices that do not have metal parts on the surface. On the contrary, they have considerable adhesion to concrete. Thus, for example, concrete tanks or various types of ceramic containers or pipes are coated with them. The properties of casein-cement materials are also known (they are also used as anticorrosive coatings when suitably formulated), in particular they have excellent adhesion to metals, especially steel.

The aforementioned problem is solved by a method of protecting steel equipment and structures against corrosion according to the present invention.

The essence of the process is to first apply a caseingree mass of 95 parts of cement and 3 to 5.5 parts of casein onto the apparatus, after which the furfural or furfuryl alcohol-based resin is applied after curing.

After the resin has cured, the device is perfectly protected from the effects of corrosive environments. The combination of casein-cement and furan resins eliminates the negative property of these resins, ie their poor adhesion to metals, and their use is enhanced. , since the 8 materials have excellent cohesion.

He did

Casein-cement mass of 95 parts of cement and 5 parts of casein was applied to a 25x35 cm steel sheet. Twenty-four hours after curing, the furfural and furfuryl alcohol β resin was applied with the appropriate hardener. After curing, the sheet was exposed to dilute hydrochloric acid at 21-23 ° C for 6 months. Even after this time the paint was not disturbed.

Example 2

The steel cover of the pump was internally coated with casein-cement compound of 95 parts cement and 5 parts casein. 24 hours after curing, a furfural-phenol resin was applied with the appropriate hardener. After curing, the lid was returned to the pump and exposed to nitric acid vapors that were sucked from the reactor. After three months of continuous operation, no changes were found in this edcoat.

P, example3

Casein-cement mass and a composition of 95 parts of cement and 5 parts of casein were applied to a 25x35 cm steel sheet. 24 hours after curing, a mixture of furfural resin and chlorinated rubber with the appropriate hardener was applied. After curing, the sheet was exposed to deminsralized water. After 6 months there was no deterioration in the quality of the demineralized water or paint.

Claims (1)

Method for the protection of steel equipment and structures against corrosion caused by the corrosive effects of water, acid and alkali, characterized in that firstly a casein-cement mass composition of 95 parts of cement and 3 to 5.5 parts of casein is applied to such equipment to which it is applied after curing resins based on furfural or furfuryl alcohol.