Under the influence of external factors, all materials to some extent change some of their properties. One of them, directly affecting the destruction of the structure of substances, are liquids. When we talk about corrosion, basically we mean the contact of various parts or structural elements with water( or its containing media), although there are other types of it - electrical / chemical, gas, and the like. Such contact can be not only direct( wetting), but also mediated. For example, in conditions characterized by excessive humidity.
All substances that have a negative effect on materials are called aggressive and are divided into strong, medium or weak effects according to the degree of influence( the intensity of destruction).Naturally, in order to extend the life of the products it is necessary to take care of their effective protection.
The most common methods are:
- application of protective films( polymers and a number of other chemical compounds);
- surface treatment with a layer of more "stable" metal;
- coating with cement( for example, engineering communications pipes - sewerage, water supply and so on);
- coloring with enamels;
- el / chemical treatment to form a phosphate layer;
- priming with special compounds.
There are other, more expensive methods. For example, alloying. Many of them are applicable only in production, as they require the use of appropriate equipment and are characterized by complex technology.
Inhibitors - what is
In the "private" sector, the capabilities of the master are limited. Therefore, in many cases it is preferable to reduce the aggressiveness of the medium with the help of special compounds. Such substances are called "inhibitors" of corrosion.
Advantages of the
- method Easy to use.
- The ability to conduct operations without the use of expensive equipment and at all stages of construction or repair.
- Cost-effective.
We will not bother the reader by reading the description of all the nuances of the ongoing chemical processes. For general information only note that corrosion inhibitors are divided into absorption and passivation. In practice, the metal protection function performs either one or several agents( a mixture of them).
Types of
- inhibitors for acidic media;
- from atmospheric influences;
- against corrosion of hydrogen sulphide;
- for storages and highways with oil products;
- for neutral environments.
In turn, all groups have an "internal classification".For example, substances are divided into organic, inorganic and volatile;mixed, cathodic or anodic.
Regardless of its chemical composition, the same agent behaves differently in one or another aggressive environment.
Main characteristics
- Pour point.
- Viscosity.
- Density.
- Solubility.
- Flash temperature.
Where corrosion inhibitors
can be used It is worth recalling to the reader that the term "corrosion" is used not only with respect to metals. Destruction under the influence of aggressive chemical compounds are susceptible, for example, ceramics, polymers and other materials. But in this case it is customary to use the word "aging".
Scope of application
We will not consider the use of inhibitors on an industrial scale. This is well known to specialized specialists. They are even added to the fuel to minimize the activity of the aggressive environment. We only note those "constructive elements" that can be protected with the help of special means in the "private" sector.
- Trumpet mains, especially areas paved on the territory( outside the building).
- Septic tanks whose tanks are made of metals.
- Roofing, walls, foundation.
- Heating systems. To prevent internal corrosion( or "rust" - there is such a term) pipes and radiators.
The product range is quite large. Here are just a few varieties of commercially available products.
"Inhibit"
Used to protect many metals and alloys. It is advisable to handle structures that are operated with excessive humidity, even at temperatures below 0 ° C( up to -40).After application, the agent forms the thinnest film. Before use, it is diluted with virtually all available solvents - toluene, white spirit and some others.
Price for packaging - from 245 rubles.
"RE-Therm"
It is considered a universal tool, as the spectrum of application is very extensive - from the processing of roofing material and pipelines( air ducts) to parts( for example, the bottom) of a personal car. The usual water is the solvent.
The price is from 480 rubles.
