The Role And Function Of Galvanized Steel Sheet

1. The function of galvanized steel plate is to prevent the surface of the steel plate from being corroded and prolong its service life. Galvanized sheet refers to a steel sheet coated with a layer of zinc on the surface. Galvanizing is an economical and effective rust prevention method that is often used, and about half of the world's zinc production is used in this process.
2. The mechanical properties are as follows:
Tensile test:
① Performance indicators: Generally speaking, only galvanized sheets for structural, tensile and deep drawing purposes have tensile performance requirements. Among them, the galvanized sheet for structure requires yield point, tensile strength and elongation, etc.; for stretching, only elongation is required. See the relevant product standards in "8" of this section for specific values;
② Test method: the same as the test method for general thin steel plates, see the relevant standards provided in "8" and the test method standards listed in "Ordinary carbon steel thin plates".
Bending test:
Bending test is the main item to measure the technical performance of thin plate, but the requirements of various galvanized sheets are not consistent in national standards. Except for structural grade, American standards do not require bending and tensile tests. In Japan, bending tests are required except for structural grades, architectural corrugated plates and general corrugated plates.
Requirements: It is generally required that after the galvanized sheet is bent for 180 degrees, there must be no zinc layer on the outer surface, and no cracks or breaks on the base of the sheet.