Surface treatment

Features

The path of the light changes depending on the direction of view or the direction of light incidence, creating a change in the color tone. It makes the color deep and vivid.Since the color is generated by an ultra-thin, transparent oxide layer, it is possible to create a colored surface by taking advantage of the treatment applied to the underlying titanium, such as a mirror finish.

In addition, the color does not fade with light at all and has good weather resistance.It also has good adhesion and can be bent and lightly stamped after coloring.

Beneficial impact	Improvement of appearance by coloring

Color samples

We offer 130 colors as “Toyo Titanium Color.”You can also request a graduated color.Please specify the color tone of your order with the color sample number. (No. indicates the anode voltage.) Material used : Nippon Steel’s TranTixxii®

Please note that it may not be possible to reproduce accurate colors due to the influence of the monitor environment and other factors.We can send a color sample book to you by mail upon request. Feel free to contact us for more information.

Principle (Manufacturing method)

A transparent oxide layer with a thickness of about 10-300 nm is grown on the surface of titanium by anodizing, which changes the surface to vivid color.Although the oxide layer itself is colorless and transparent, white light including the light of various wavelengths is reflected on the surface, and the light reflected on the surface of the oxide layer and the light reflected at the interface between the metal and the oxide layer cause an interfering effect, making the light with an intensified wavelength appears as a color.

Since the intensity of the wavelength is determined by the thickness of the oxide layer, the desired color can be achieved by precisely controlling the thickness.The principle of coloration is the same as that of a rainbow caused by a thin transparent film of soap bubbles and a rainbow caused by a thin layer of oil and fat floating on the surface of the water.With our continuous coil coloring line technology, it is also possible to color long coils.

Pickling

In this method, titanium is immersed in a special acid solution to completely remove the natural oxide layer on the surface, followed by anodizing.It is characterized by the formation of a completely clean anodic oxide layer, which results in extremely vivid colors.This coloration method is ideal for monuments, signage and accessories.

Anodizing without pickling

In this method, the surface of titanium is degreased only and then anodized.It produces a subdued color on the surface of titanium due to the compound layer formed by the natural oxide layer and the anodic oxide layer.This is the ideal coloration method for building materials (roofings, walls, etc.).

It can also be used in continuous coil lines, which reduces coloring costs compared to batch coloring.

Titanium greenish-blue coloring

By applying a green color to the alumina-blasted plate, it creates a color similar to the greenish-blue color of copper.And even if it develops into a different color, it can still look very subdued.

Titanium does not corrode and requires no maintenance, making it a low-cost material for long-term use.It is used as an alternative to copper roofs that have been corroded by acid rain, such as the roofs of shrines and temples.

Titanium Corten coloring

Titanium is anodized in a special solution developed by our company and can be colored in matte brown, purple, and gray.As it looks very subdued, it is used for the roofings of temples, museums, and galleries.

We hold intellectual property right jointly with Nippon Steel.