"Процветание придает особую проницательность здравому смыслу"

Luc de Clapier Vovenarg

To each his own.

Latin proverb

Ad manum.

Под рукой.

Random phraseology:

Devoted without flattery.

Meaning:

About people flatteringly bowing before an influential person (book iron.).

Origin:

Betrayed without flattery - the coat of arms motto of A. A. Arakcheev (1769-1834), assigned to him by Paul I. This hypocritical characterization of a cruel general, known for his merciless military and police actions, was ridiculed by the progressive society of Russia. A. S. Pushkin's epigram "Na Arakcheeva" ("The oppressor of all Russia ...") contributed to the spread of a pun based on the homonymy of the words "without" and "demon".

Why does iron rust?

If you leave any iron object in a damp and damp place for several days, it will rust, as if it had been painted with reddish paint.

What is rust? Why does it form on iron and steel objects? Rust is iron oxide. It is formed as a result of the "combustion" of iron when combined with oxygen dissolved in water.

This means that in the absence of moisture and water in the air, there is no oxygen dissolved in water at all and rust does not form.

If a raindrop falls on a shiny iron surface, it remains transparent for a short period of time. Iron and oxygen in the water begin to interact and form an oxide, that is, rust, inside the drop. The water becomes reddish and the rust floats in the water as small particles. When the drop evaporates, rust remains, forming a reddish layer on the surface of the iron.

If rust has already appeared, it will grow in dry air. This is because the porous rust patch absorbs the moisture in the air - it attracts and holds it. This is why it is easier to prevent rust than to stop it once it has appeared. The problem of rust prevention is very important, since iron and steel products must be stored for a long time. Sometimes they are covered with a layer of paint or plastic. What would you do to keep warships from rusting when not in use? This problem is solved with the help of moisture absorbers. Such mechanisms replace moist air in compartments with dry air. Rust in such conditions can not appear!