JIS G3303:2008 Electrolytic Tin Plate Coil for packaging box and
cans
Tinplate coil, commonly known as tinplate (SPTE), is a cold-rolled
steel sheet with a thin layer of tin on the surface.
It has a certain degree of strength and hardness, good formability,
easy solderability, the tin layer is non-toxic and tasteless, the
surface is shiny, and tin is mainly used to prevent corrosion and
rust.
It is distinguished between hot-tinned and electro-tinned sheet
according to the manufacturing process. Commonly used storage
bottles and beverage cans are manufactured from tin-plated steel
sheet.
Tinned coil (commonly known as tinplate) is manufactured from a
thin pressable steel sheet as the base material, the surface of
which is tinned and covered with a multi-layer protective coating
(layer) of steel material.
It is corrosion-resistant, non-toxic, tasteless, has a shiny
surface, is lightweight, very strong (compared to paper, wood and
composite materials), easy to paint, easy to weld and form, and
adaptable to ambient temperatures.
As a result, more than 70% of the total production of tin-plated
steel sheet is used for food and beverage packaging. It is also
used for packaging and shaking of raw materials in the chemical and
pharmaceutical, electromechanical, hardware, telecommunications and
instrumentation industries.
The main feature of tinned coils is that the tinned layer is
protected by a double electrochemical strength of cathode and
anode, that is, when there is a complex mixture (or weak acid
solution) and a certain degree of vacuum on the walls of the food
can, the potential is lower than that of the iron base metal, tin,
because the anode is dissolved During the shelf life of the tin
can, the amount of dissolved tin is basically harmless to the human
body; and the outer wall of the solute in the atmosphere is in a
state of cathodic protection with a tin layer, which gives it
sufficient chemical stability, not comparable to that of other can
materials.
