Corrosion protection

Surprisingly, plants contain organic compounds which can protect the metal from corrosion. So-called corrosion protection is made possible by a specific processing stems, bark, fruit and leaves of a plant.

How, then, comes the corrosion protection?

How, then, comes the corrosion protection? Imagine that bulky steel part must be cleaned of rust. Therefore, the chemical method is needed, for example, acid etching. If put down part in a solution of any acid it will dissolve the metal part. Therefore, a solution is needed that would delete rust, but did not touch the metal itself. Such etching solutions have long been used in practice. Besides acids, they contain another important additive - corrosion inhibitor. This is a substance which retards the dissolution of the metal sharply, but almost not prevents dissolve corrosion products. How to extract the corrosion inhibitors from plants?

Of the wild plants for experiments suitable celandine, corydalis, medicinal marshmallow and yarrow - their leaves and stems. Note that many of these plants are in a dry form in pharmacies. For the experiments, plants need several copies. Warnings about caring for nature remain in force, as well as the proposal to consult with an expert in biology.

Corrosion protection using inhibitors will be available through some crop plants. Suitable for experiments leaves and stems of potatoes and tomatoes. It makes sense to wait until the harvest is ripe and take for experiments already unnecessary plant residues.

Leaves and stems of wild or domestic plants chop with a knife and fill the weak concentration of not more than 5% hydrochloric acid solution. If you use a pharmacy hydrochloric acid, then dilute it with water about half. Leave the mass for a few days in a sealed container to the extraction took place as completely as possible. One week, at least, should be sufficient. When the extract is ready, make a pickling solution for rusted parts. If a lot of rust, the composition of the solution (for convenience - by volume) will be: 5 parts of extract - 40 parts of concentrated hydrochloric acid and 75 parts water. If corrosion is not very much, it is necessary to take 10 parts extract and about 20 parts of the acid; the amount of water can also be slightly increased.

In such solutions, you can immerse the rusted parts. They very soon become shiny, as if brand new.

But what kind of substances are in plants that so well protected against corrosion? This are complex compounds - alkaloids, polysaccharides, proteins, tannins and mucous. All of them, though in varying degrees, have the ability to be adsorbed on the metal surface and fixed thereon. Therefore, they prevent direct contact of the metal with an acid. With rust, they do not wish to be united, so she dissolves in acid.