Office Chair Scratches Floor Tiles

The repair and prevention of scratches on floor tiles caused by office chairs require targeted measures based on the severity of the scratches. The core reasons are related to material hardness, usage methods, and component wear.

Repair Methods for Existing Scratches

1. Minor Surface Black Marks or Shallow Scratches
   If the scratches only remain on the surface glaze of the tiles without damaging the structure, physical cleaning methods can be used: Mix baking soda with water in a 1:2 ratio to form a paste. Dip a soft cloth into the paste and gently wipe in a circular motion, utilizing the mild abrasiveness of baking soda to remove black marks. Alternatively, repeatedly wipe with a damp sponge, and some soluble stains may be carried away by the water. Be careful not to apply excessive force during operation to prevent further damage.

2. More Severe Scratches
   If the scratches are deeper than the glaze layer or have obvious dents, ordinary cleaning cannot repair them. In this case, it is recommended to contact professional housekeeping companies or tile repair personnel to restore the surface flatness through methods such as polishing, filling with the same-colored glaze, or partially replacing the tiles. Using acidic cleaners (such as hydrochloric acid) on your own may corrode the tiles and worsen the damage.

Main Causes of Scratches

1. Improper Adjustment of the Pneumatic Rod Height
   When the pneumatic rod is adjusted to the lowest gear, the metal structure of the base (such as the five-star foot) may directly contact the ground. During sliding, friction may cause scratches on the tiles. It is recommended to adjust the pneumatic rod to a height of 1-2 cm above the ground to leave a buffer space.

2. Wear of Base Components
   After long-term use, the nylon casters may wear out, exposing the metal axles. During sliding, hard contact with the tiles may produce arc-shaped scratches. Regularly check the condition of the casters and promptly replace them with steel casters with bearing designs to reduce direct metal friction.

3. Difference in Material Hardness
   The Mohs hardness of glazed tiles is about 5-6, while the aluminum alloy of the pneumatic rod base can have a hardness of up to 7 or more. When the local pressure exceeds the bearing limit of the tile glaze (about 10-20 MPa), irreversible scratches are likely to occur. PVC or silicone protective pads can be placed between the chair feet and the ground to disperse the pressure.

4. Aging and Displacement of the Pneumatic Rod
   After long-term use, the aging of the internal seals of the pneumatic rod may cause the rod body to slowly sink, reducing the distance between the base and the ground and increasing the risk of scratches. Regularly check the stability of the pneumatic rod and replace it with a new one if necessary.

Preventive Measures

• Adjust usage habits: Maintain the height of the pneumatic rod above the ground to avoid contact between the metal components of the base and the ground.
• Choose suitable casters: Give priority to steel casters with bearings to reduce friction resistance.
• Lay protective layers: Cover the tile surface with PVC pads or carpets to buffer the pressure from the chair feet.
• Regular maintenance: Check the wear of the casters, pneumatic rod, and base every 3-6 months and promptly replace aging components.