Author: [Ozerkovskiy] v. a.

“Corrosion protection” of metal constructions and concrete - one of the most important functions of anticorrosive coatings or paints. For the protection of metals and concrete from the corrosion adapt, traditionally different paints and coatings. Before the practice of the design of past years for the protection of structures adapted the cheapest protective materials for the purpose of a reduction in the initial estimate cost of buildings. Before the majority of the cases this led down the short period of the service of these materials and an increase in the operating costs.

Planning organizations do not today always pay the adequate consideration down an increase in the longevity of structures and to the reliable protection of buildings and construction from the aggressive actions. In spite of the presence of the affirmed normative documents on the anticorrosive protection and of the standard designs, intended for the work before the aggressive medium, before the practice of design they are used still insufficiently. The methods of the evaluation of the design solutions on those given to expenditures, although they are [rekomendovany] by last instructional and normative documents, did not find an even wider application, especially before the part of the calculation of expenditures for the stage of the operation of buildings and construction.

At present, as a rule, the producer of coloring works " discovers” first of all the cheap protection circuit of metal and concrete, reducing the prime cost of the carrying out of works for the extraction of enormous profit. It is not rare, very works superintendent decides, what diagram of painting it is necessary to use on one or other object or another. Besides in all, often it independently makes decision about order and thickness of putting protective layer, ignoring the recommendations of the developers of these materials. And, after all, pass objects down the operation with the disturbance of all standards, beginning from the surface preparation for painting and ending for the sake of their painting. Result - marriage! The following errors of the producer of coloring works - this is the selection of paint on its cost. Not rarely we hear the words: “How much costs 1 kilograms of this enamel?”. Answer down this question, is often decisive before the acquisition of one or other paint or another.

With the selection of shielding system from the corrosion of metal and concrete it is first of all necessary to focus attention on the recommendation of producer for the surface preparation for painting. The preparation of the painted surface before the expenditures from the means for painting being isolated is from 70 to 80%. Cost of paint itself - 20-30%. It is obvious that the price of paint itself is not basic index before the rise in price of painting from the calculation at the point of 1 square meter of the painted surface. Also with the selection of paint it is necessary to focus attention on “the dry residue” (share not of volatile substances). If paint costs 50 [rub]./[kg] and “the share not of volatile substances” composes 25%, then beyond the painted surface afterward drying will remain 250 g. coating. If paint costs 100 [rub]./[kg] and “the share of non-volatile substances” composes 50%, then beyond the painted surface afterward drying it will remain 500 g. coating. Consequently, about the eventual result, the costs of these two paints are equivalent. With the selection of coloring system it is necessary to track the following properties:

• the lowered requirements at the point of the surface preparation for painting;
• the possibility of putting at reduced and minus temperatures;
• the high speed of drying at minus temperatures;
• the possibility of putting with the high humidity to 100%;
• the possibility of putting beyond the moist surface;
• the possibility of putting beyond the rusty surface;
• simplicity before the application (material single-component, practically must be absent sediment with the high viscosity. Putting - by brush, by roller, by airless and air-stream atomization);
• maintainability;
• the possibility of putting the thick layer beyond the vertical surfaces and the contiguities without the inflows;
• the high hydrophobicity (it does not absorb beside itself water);
• wide range on the compatability of paints, including with the old coatings.

This article is written, for the purpose to help the producers of coloring works it is better to be oriented before the flow the proposed systems of the protection of metal and concrete. Also article is aimed against the savings with the carrying out of works on anticorrosive protection and increase in its quality.

Chief of the laboratory of privately held company “[NPO] Of [korrZashchita]” of [d].[kh].[n]. [Ozerkovskiy] v. a. http://www.omkarindus.com info@omkarindus.com

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