When you buy nails, the most of the time, you are interesting only in their sise, because you are not familiar with all the nuances of nails and screws.
Today we will find out how different nails differ in color : yellow, white and black.
White
As a rule, self-tapping screws are made of solid steel. Initially light gray in color; In this case it is customary to call it white.
Stainless steel screws are used for corrosion resistance. It has a number of advantages:
It does not rust (high - 10.5% - the chromium content makes it resistant to corrosion); It has a long service life - it is calculated in contracts; Strong enough to withstand heavy loads.
These normal stainless steel screws are used for indoor work if the air humidity does not exceed 65%. Due to its unattractive appearance, it is often hidden under plaster and other finishing materials.
Silver
Another kind of bolts are white galvanized. Made of carbon steel, it is durable. However, due to the presence of carbon in the iron alloy, these screws quickly rust. To prevent corrosion from “rust” of the metal, a layer of zinc is applied by the galvanic method. An additional advantage of galvanizing is that it gives the metal a noble silver tint.
It is believed that these galvanized nails can be used indoors and outdoors, but experienced craftsmen do not recommend installing exterior parts that will be exposed to frequent and prolonged environmental factors in the future.
Black
Black nails are one of the most common. It is made of carbon steel, and a dark layer is formed on the surface.
This type is black zinc plated. The first method is black zinc plating. This is a type of chromate. The thickness of the chromium layer can vary from 0.25 to 1 micron, providing a different degree of protection against corrosion. When purchasing black screws, it is better to choose those that are painted - their rust resistance is much higher. But in any case, screws covered with a layer of black galvanized zinc are not intended for use in conditions of high humidity, as well as in a chemical environment.
nails are one of the most common. It is made of carbon steel, and a dark layer is formed on the surface.
This type is black zinc plated. The first method is black zinc plating. This is a type of chromatic. The thickness of the chromium layer can vary from 0.25 to 1 micron, providing a different degree of protection against corrosion. When purchasing black screws, it is better to choose those that are painted - their rust resistance is much higher. But in any case, screws covered with a layer of black galvanized zinc are not intended for use in conditions of high humidity, as well as in a chemical environment.
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