Pretreatment for plating and coating as an alternative to plasma
Ti coating film formation
What is "thin film coating pretreatment" by wet blasting?
When wet blasting is used as pretreatment for coating, a strong coating film can be formed on the surface by the anchor effect, which provides nano-level fine unevenness having no time dependency.
Wet blasting is a physical process and compatible with a wide range of organic and inorganic materials.
Four features of wet blasting
- No time dependency There is no time dependency due to the wettability improved by surface area expansion.
- No deterioration Since processing heat is not generated, no deformation or deterioration occurs.
- Nano anchor formation Nano fine uneven surfaces are formed and an anchor effect can be expected.
- Fast batch processing The etching rate is larger than that of other surface etching methods. The desired etching amount can be obtained in a short time.
Picture of wet blasting
Wet blasting is a technique to project a mixture of abrasive and water at high speed with compressed air against a material to clean, process, and modify its surfaces. This technique allows fine abrasives to be used due to wet processing, and is good at forming a fine uneven surfaces while grinding the surface of the workpiece together with dirt and foreign matter.
In addition, this chemical-free technique is eco-friendly and environmentally friendly, and it is also effective in reducing industrial waste.
Evaluating the cleaning power of wet blasting
A comparison of untreated and wet-blasted surfaces shows that the amount of carbon (contamination) on the surface was reduced.
Comparison of element concentrations before and after wet blasting
Glass x SiO2 coating
Results of cross-cut test
- Processing condition / abrasive：Polygonal alumina / Air pressure：0.20MPa