Color stainless steel coloring principle

Color stainless steel coloring principle

(1) after the surface oxidation coloring treatment of stainless steel in the chemical coloring solution, showing a variety of colors, not forming a colored surface coating, but caused by the interference of light.

When the refractive index n of the oxide film on the surface of stainless steel is constant, the dry catastrophe color is mainly determined by the thickness h of the oxide film and the natural incident Angle I.

When viewed vertically, the relation between film thickness n and color is shown in table 1.

Table 1 relationship between film thickness h and color

The serial number

color

Film thickness h (nm)

Wavelength (nm)

1

blue

80

450 ~ 480

2

golden

110

580 ~ 600

3

rose

140

650 ~ 750

4

Dark green

190

500 ~ 560

5

Lemon yellow

240

560 ~ 580

6

rose

260

650 ~ 750