Zinc Phosphating Agent

Introduction and application of Zinc phosphating agent

Specification of Zinc phosphating agent

The main components of the phosphating solution are dihydrogen phosphate, such as Zn(H2PO4)2, as well as an appropriate amount of free phosphoric acid and accelerator. The accelerator mainly plays the role of lowering the phosphating temperature and accelerating the phosphating speed. The most commonly used oxidants as chemical accelerators include NO3-, NO2-, CIO3-, H2O2, etc. Phosphating is a process in which metal reacts with dilute phosphoric acid or acid phosphate to form a phosphate protective film. Phosphating liquids are mainly divided into six categories according to the phosphating film-forming system: zinc series, zinc-calcium series, zinc-manganese series, manganese series, iron series, and amorphous phase iron series.
The main components of zinc-based phosphating bath liquid are: Zn2+, H2PO3-, NO3-, H3PO4, accelerator, etc. The main composition of the formed phosphating film (steel parts): Zn3(po4)2·4H2O, Zn2Fe(PO4)2·4H2O. The phosphating grains are dendritic, needle-shaped, and have many pores. It is widely used in priming before painting, anti-corrosion and cold working anti-friction lubrication. According to the phosphating treatment temperature, it can be divided into four categories: normal temperature, low temperature, medium temperature and high temperature. Phosphating at room temperature means phosphating without heating. The general processing temperature of low-temperature phosphating is 30~45℃. Medium temperature phosphating is generally 60~70℃. High temperature phosphating is generally greater than 80°C. The temperature classification method itself is not strict. Sometimes there are sub-medium temperature and sub-high temperature methods, depending on everyone's wishes, but generally the above-mentioned classification method is followed.

Package of Zinc phosphating agent

100G/1kg/25kg /200kgdrum

This product is valid for 24 months from the production date when stored in a warm sealed state.

Safety and Transportation

This product should be stored and sealed at room temperature. Customers should carefully read the product treatment, material safety data sheet (MSDS), and labels before use, be familiar with the product's safety information, operating instructions, and environmental impact, and wear appropriate personal protection as required. supplies.

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