Anti-corrosion compounds for body treatment
Name of composition | brand | Working viscosity, in sec. at 200°C according to VZ-4 | Type of solvent, diluent | Drying mode | |
°C | min. | ||||
Autopreservative Thresholds | "MOVIL" | 15 – 40 | White spirit, gasoline | 20 | 20 – 30 |
Protective lubricant, non-drying | NGM-ML | 45 |
| 20 | 15 |
Protective film coating | NG-216B | 18 – 22 | White Spirit | 20 | 20 |
Antinoise mastic | BPM-1 | high viscosity | White spirit, gasoline | 100–110 | 30 |
PVC compound | Plastisol D-11A | high viscosity | – | 130 | 30 |
PVC compound | Plastisol D-4A | high viscosity | – | 130 | 30 |
Non-drying mastic | 51-G-7 | high viscosity | – | – | – |
The load-bearing hollow profiles of the body, the bottom, the lower parts of the doors, pillars, as well as the joints of body parts, including the places of spot welding, are most susceptible to corrosion.
Corrosion develops most rapidly in hidden cavities and lower parts of the body when moisture, dirt, salts, and acids get on the surface.
In this regard, during the operation of the car, additional protection of the internal surfaces and hidden cavities of the body is required by applying special anti-corrosion compounds, and in the joints of parts by applying sealing mastics.
The materials used for anti-corrosion treatment are indicated in the table Anti-corrosion compositions for body treatment.
Auto Preservative "Movil" used for processing hidden cavities. It is recommended to treat cavities every 1–1.5 years. Auto Preservative "Movil" allows the treatment of surfaces previously covered with nigrol or other oils, as well as rusty surfaces.
Protective lubricant NGM-ML is used for processing hidden cavities. The hidden cavities of new cars are treated with this material.
Protective film coating NG216B is used to cover parts of the car under the body.
Anti-noise bituminous mastic BPM-1 is used to protect against corrosion of the bottom of the body and to reduce noise from vibration. The mastic is applied by spraying or manually with a thickness of 1.0-1.5 mm.
Plastisol D-11A is used to protect the bottom of the body from corrosion, from abrasive wear and for noise insulation. Coating thickness 1–1.2 mm. Adhesion of plastisol to primers EF-083 and FL-093.
Plastisol D4A is used for sealing welds on the outer areas of the body.
Non-drying mastic 51-G-7 is used to seal body joints.
The anti-corrosion agent is sprayed into the internal cavities by air or airless spraying.
Air spraying requires compressed air with a pressure of 0.5–0.8 MPa, a paint spray gun with a reservoir, hoses and gun extensions. The best coating quality is achieved with airless spraying at a pressure of 412 MPa, which allows spraying materials of significant viscosity.