Ordering of substrates
1. It is necessary to understand the requirements of prepainted zincalume steel coil users on the specifications and performance of the substrate, as well as the use and processing methods.
2. It is necessary to clarify the specifications of the relevant substrates, such as the product name standard, the surface state, the size and presence of spangles, the post-plating treatment, the amount and scope of galvanizing, the size and specifications of the coil, the mechanical properties and the applicable standards and scope of the size.
3. Recognition of packaging, transportation methods, and related contract content. Since it is customary for the steel coil to be severely eroded during the transportation after leaving the factory, the manufacturer is not responsible. However, in exceptional cases like long-distance shipping, you can consider whether to participate in insurance.
Acceptance and storage of substrates
1. The warehouse used for the original prepainted zincalume steel coil should meet the conditions of dryness, no sand, and no corrosive gas, and the storage time should be shortened as much as possible.
2. After the raw material sheet coil arrives, it should be compared according to the order contract, and it can be put into storage only after it is correct. When entering the warehouse, pay attention not to damage the coil packaging during loading and unloading. At the same time, visually check whether the packaging is damaged, whether there is severe corrosion or water immersion, etc., and make a record.
Uncoiling inspection and acceptance of substrates
1. After the galvanized sheet is rolled into the warehouse, the uncoiling inspection shall be carried out according to the regulations. After opening the coil, first, carry out a visual inspection and carefully record if rust or the state of the two sides is different. It can be seen from the above that in the production of color surface adjustment, phosphating treatment
2. For the waste liquids of chromatin and passivation treatment, the total amount, acidity, and alkalinity of these waste liquids and the ions that may cause environmental pollution are different. If the visual inspection is qualified, the quality performance inspection of the galvanized steel sheet shall be carried out. The inspection items shall not be less than the corresponding items for the prepainted zincalume steel coil inspection. The inspection results must be reported before the production plan is issued. This is the basis for whether the product can be used or not. One.