Effect on tin impurities
Are you interested in the influence of impurities on the properties of tin from the supplier company AvecGlob? Here you will find the necessary information on this topic.
Resistance of surface coatings
The tin coating is often porous, scaly and its properties depend on the chemical composition. Tin, in its pure form, is a white metal, almost as shiny as silver. In the cast state, the tin crystallizes easily, and the crystals thus obtained are sometimes cubic, and sometimes in the form of a prism with a square base.
Air, even when wet, practically does not affect tin at ordinary temperatures, it causes the formation of a gray coating consisting of tin protoxide and tannic acid, which keeps the metal from further changes. Most acids, both mineral and organic, have a significant effect on tin. Sulfuric acid in a dilute state has little effect on this metal; but in the concentrated state, it rapidly converts the metal into tin oxide sulfate.
The effect of acids
Dilute hydrochloric acid has little effect on tin, but as its concentration increases, it rapidly dissolves the tin, converting it into tin protochloride and turning into hydrogen. The action of dilute nitric acid is slow, but with four equivalents of water, as is the case with all commercial acids. The metal turns into a white powder, which becomes insoluble in nitric acid. Hydrogen, which is contained in water vapor and in water, combines a portion of the nitrogen of nitric acid with the formation of ammonia, which is contained in the liquor in the form of ammonia nitrate. If nitric acid is monohydrated, tin can remain in contact with it for a period of time without undergoing the slightest change, but with the addition of the smallest amount of water, a strong chemical reaction will occur, which causes intense heat and sometimes a flame.
Supplier — AvekGlob Company — offers various types of products from tin of domestic and foreign production, which meets the requirements of standards. The products are offered at affordable prices from the manufacturer. The supplier guarantees the timely delivery of products to any address specified by the consumer.
Chemical resistance of tin
A mixture of common salt and vinegar, if it is in a tin container, will quickly lead to its destruction. Because acetic acid boils at a higher temperature than hydrochloric acid, acetic acid combines with the salt to form soda acetate and leaves hydrochloric acid in a free state to combine with tin as tin protochloride.
Hydrated alkalis attack tin, forming hydrogen, and the products of this reaction are soluble metastates. Oxygen produces various combinations with tin, the most important of which are protoxide, binoxide and tin peroxide, tannic and metastannic acid. A solution of nitrate in water also destroys tin.
Impact of impurities
Tin, in its pure form, is so soft and fusible that it has no practical application for making dishes that are exposed to heat, and for this reason it is rarely used without impurities. Industrial grade tin often contains impurities. A high specific gravity is an indicator of the impurity, and when the color of the metal has a bluish or grayish tint, the presence of copper, lead, iron and antimony can be suspected.
The purer the metal, the more distinct its crackling is, the whiter and brighter its appearance, and the less it seems to crystallize on the surface. To obtain the metal in its pure form, it must be treated with nitric acid, which dissolves all the foreign metals that it can contain, converting tin into metastable acid. Arsenic, which can be present in the tin, can be 1/600 parts, which is acceptable. In order to increase the hardness of tin, the metal is alloyed with lead (up to 18… 20%).
Supplier — AvekGlob Company — offers to purchase tin in a wide range of profiles and technological applications. Products can be bought at a price formed on the basis of European and world standards. Implementation is possible in bulk and retail, for regular customers, a flexible system of discounts operates.