Stainless steel surface treatment process

Nowadays, in large shopping malls, office places, sculptures, curtain walls, screens, decorative walls and so on, the common variety of colors, patterns, shapes of stainless steel are all processed by the surface treatment process of drawing, mirror, sandblasting, titanium plating, etching, anti-fingerprint and so on.

Stainless steel surface treatment process

1. Brushed (frosted)

Usually, the surface of stainless steel is processed by mechanical friction to produce straight lines (also called frosted), including wire drawing, grain, and ripples.

Processing quality standards: The thickness of the texture is consistent and uniform. The texture on each side of the product is natural and beautiful according to the design and construction requirements. The bending position of the product is allowed to have slight messy texture that does not affect the appearance.

2. Mirror surface

A bright surface effect is obtained by using polishing and grinding equipment to use high-quality oil stone, diamond grinding paste and different grades of sandpaper through rough grinding, medium grinding and fine grinding.

Processing quality standards:

1. No sand lines and hemp lines (orange peel lines).

2. The surface should be smooth, and there should be no depressions, protrusions or undulating wavy surfaces (haha mirror).

3. There are no residues, sand holes, scars, impurity spots, bumps or scratches on the blank surface.

4. The brightness reaches 8K, and the brightness of the finely polished mirror exceeds 8K.

3. Sand blast

The compressed air is used as the power to form a high-speed jet beam to spray the spray material (quartz sand, emery) at high speed to the surface of the workpiece that needs to be treated, so that the board surface presents a fine bead sand surface, forming a unique decorative effect.

4. Etching

The process principle of chemical etching pattern text on the surface of stainless steel is to cover the part of the surface that is not etched by a special corrosion inhibitor layer, shielding the acid, so that the acid can only contact the surface of the part to be etched, and the purpose of etching pattern and text is achieved from the surface.

5. Titanium plating

Also known as stainless steel titanium/zirconium coating, is in a vacuum container, the formation of titanium/zirconium compound on the surface of the stainless steel ion film layer, the film can be in the outdoor environment for a long time to fade.

Titanium plating principle: In the high temperature, vacuum titanium furnace, titanium, zirconium metal, the glow discharge of inert gas to ionize metal or alloy vapor, ions accelerated by the electric field and deposited on the negatively charged stainless steel plate, thus forming a rich and colorful metal film.

6. Anti-fingerprint

Stainless steel fingerprint resistant plate is a composite coated plate obtained after fingerprint resistant treatment on the surface of stainless steel, and its coating method is mainly roller coating.

Fingerprint resistant processing process, originally in order to meet the needs of users in the field of home appliances, in the production process, due to the needs of the process, many parts manual touch, sweat stains are easy to form pollution on the surface of the parts, affecting the appearance, fingerprint resistant plate research and development is the beginning.

What are the common quality problems of stainless steel? How to prevent it?

1. Stainless steel facings and stone flat receiving openings have uneven widths and cannot be closely spaced.

Cause Analysis:

Stainless steel is processed to a fixed length in the back field, and the chance of size deviation is small. However, due to the vertical installation, it may cause arching in the middle.

Solutions (preventive measures)

(1) The stainless steel edge can be folded and then collided with the stone.

(2) According to the design requirements, stainless steel grooves can be considered. At the same time, the sides of the stone need to be polished and polished. The stainless steel extends in and the stone buckles the stainless steel, which can effectively handle the closing between the two materials.

2. Stainless steel is welded with ordinary electric welding rods

Cause Analysis:

(1) The project department did not provide technical explanations to the construction team and operators in accordance with the requirements for metal welding and cutting operations.

(2) Different metal materials are welded without the stainless steel welding wire (solid core wire or flux cored wire) selected in accordance with regulations, resulting in quality and safety hazards.

Solution (preventive measures):

(1) The technical person in charge of the project department must strictly follow the requirements for metal welding and cutting operations and provide technical briefings to the construction team and operators and strictly follow the operating procedures.

(2) Stainless steel welding materials generally use matching stainless steel welding wires for welding according to the differences in base metal and working conditions (including working temperature and contact medium, etc.), so that it is possible to achieve the expected welding quality.

Glorysteelwork Specialized in supplying stainless steel plate for years, we cooperate with TISCO, BAOSTEEL, LISCO etc.