Xiaobian recently received several inquiries from several customers, asking why the steel tray will rust?Some customers are in the purchase of steel tray use time of 1-2 years, there appeared rust, peeling phenomenon, then what is the cause of this?Let's take a look together
I. Steel quality problems selected by the steel tray

The general steel cost accounts for most of the tray sales price, so there will be some small factories in order to let the steel tray in the price advantage, will reduce the amount of steel with pallets to reduce the cost.There is also the use of cheap and inferior small rolling mill rolled out of thin sheets to produce trays.And small rolling manufacturers lack of equipment, to form a roll of material needs to be heated many times, steel in multiple heating process, the temperature is difficult to control, the mechanical properties of different parts of the material will have certain differences, at the same time Fe-C crystals will produce diversity and instability, material surface density is poor, corrosion resistance is weak.

II. Paray surface spraying technology:
Steel tray spraying process generally needs to go through the following steps: rust removal, oil degrease, phosphochemical treatment, water cleaning, drying, electrostatic powder, heat melting, curing, etc.These steps in each process processing time control, the concentration of phosphol, water temperature, temperature of the drying room have strict requirements, need very good control, if the equipment is not advanced enough is an objective problem, so subjective damage the normal process, its purpose is to hope to reduce process, reduce processing time to reduce the shelf cost.But doing so makes the product quality unguaranteed.Take phosphorization as an example, powder spraying can still be done, and it is difficult to see problems in the short term.

The above is small for you to sort out about steel tray surface will rust, peeling the main reason, small make up here to remind at home when purchasing steel tray do not simply because of the price, but to choose many reliable and professional manufacturers for comprehensive comparison, combined with its production scale and other factors to choose, to decide the reliable supplier.