- HELP
- Technical Information
- Sheet Metal Parts
- Accuracy and Machining Specifications
- About Painted Sheet Metal
About Painted Sheet Metal
Hanging jig marks
- Hanging jig marks from plating and painting may remain (See figure below).
- For information on modelling hanging holes, please refer to ‘Hanging Holes for Plating/Painting’.
Example of hanging jig marks on plated products
Example of hanging jig marks on painted products
Coating thickness and coating quality
The coating thickness of plated products is generally as shown in the table below.
| Surface Treatment | Film thickness *1 |
|---|---|
| Electroless Nickel Plating | 5-10μm |
| Black Oxide | 1μm- |
| Trivalent Chromate (clear) | 5-15μm |
| Trivalent Chromate (Black) | 8-13μm |
| Anodized (clear) | 5-15μm |
| Anodized (Black) | 10-15μm |
| Anodize (matt black) | |
| Trivalent Chromate Passivation (SurTec 650) | 0.1-1.0μm |
Hanging jig marks may be left when painting (see diagram on right).
The base coat of painted products is iron phosphate coating.
The main quality standards are shown in the table below.
The values are approximate values.
| Powder Coating | Painting | ||
|---|---|---|---|
| Film thickness *1 | 80±30μm |
|
|
| Baking temperature | 180℃ | 140℃ | |
| Baking time | 20 to 30 min. | ||
| Salt spray test *2 | 120 hours | 72 hours | |
We conduct confirmation using a film thickness gauge, peeling off with tape, and board test with a test piece.
The appearance is visually checked for color, dust, spots, dimples, etc., referring to the “Miscellaneous Materials Measurement Chart,” and the tapped holes are checked for functionality by passing bolts through them.
For cleaning, wipe with water or wipe with water after wiping with diluted neutral detergent using a soft cloth or sponge, and then wipe dry with dry cloth.
Please refrain from using petroleum solvents such as thinner, benzene, etc. and alcohol.
Appearance: black oxide coating
- The parts are shipped with a rust preventive applied to the surface.
- However, depending on the amount of residual oil, colour unevenness may occur easily, and it may be particularly noticeable on larger products.
- Even if colour unevenness occurs, there is no issue with the coating performance.
- Please note that once the oil is removed, rust may develop more quickly.
If colour unevenness is not acceptable, please also consider using trivalent chromate (black) or coating (black).
Example where colour unevenness is noticeable due to low surface oil content.