Special nano-silica dispersion for sealing agent,,
Properties of nano-silica dispersion
Nano-silica dispersion has super acid resistance, alkali resistance and high temperature resistance. The nano-silica dispersion developed and produced by our company Silicon oxide solutions are acidic, neutral, and alkaline, and similar types of products are used in different environments. This product has strong acid resistance, alkali resistance and temperature resistance. It has good stability in strong acidic environments, such as trivalent chromium, hexavalent chromium, phosphoric acid and other solutions. In the sealed state at ℃, no gel change will occur for half a year, ensuring the performance and quality of the product itself.
Super strong permeability. The size of ultra-fine nanometers is in the ~ range. It has the characteristics of high activity, making the product highly permeable and can affect the edge areas that cannot be affected by metal surface treatment processes such as electroplating. , can well fill in defective locations such as ultra-fine micropores, and improve anti-corrosion and salt spray resistance.
Nano-silica with strong reactivity and insulating properties can act on microporous defective parts in a short time (seconds to seconds). After baking and drying at an appropriate temperature (℃), it will bond with the base The reaction combination of materials and surrounding auxiliary materials plays a good anti-corrosion protection role to achieve the effects of improving the corrosion resistance and salt spray resistance of the workpiece.
Mechanism of action of nano-silica dispersion
The principle of nano-materials in improving the corrosion resistance and salt spray resistance of metals such as electroplated metal devices and coils is different from that of galvanizing, brushing protective paint, etc. Processes such as electroplating and painting cannot ensure that the corners of the device or even the main parts of the device are completely and absolutely protected by the plating or paint layer. Under a microscope, the electroplated workpiece has many ultra-fine pores (micron or even nanometer scale) exposed to the air. These unprotected defective parts will be the source of electrochemical reactions that cause the metal workpiece to rust. . Nanomaterials will use their special permeability, insulation, and reactivity to effectively target defective locations that cannot be affected by electroplating, painting, and other processes, greatly improving the corrosion resistance and salt spray resistance of metal devices.
How to use nano-silica dispersion material
Used in the passivation liquid in the electroplating process, add the product directly to the passivation liquid product, stir evenly, and then use it according to the normal process .
Use it directly as a sealing agent. Dilute the product ~ times with pure water, and then directly soak the device after electroplating, passivation, water washing and other processes in the pure water solution. The soaking time is about seconds, take it out and dry it. Can.
The product can be directly added to the original passivation liquid and sealing agent concentrate to improve product performance
It can also be directly added to the working liquid in the electroplating process for use.
The above methods can greatly improve the corrosion resistance and salt spray resistance of metal devices. Depending on the type of process, it can generally be improved based on the original salt spray resistance time~.
Nano silica dispersion product performance index
Item
Index value
Model
Appearance
Translucent liquid< br/> Transparent liquid
Silica content ()
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Particle size
Viscosity
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