Anti-corrosion protection of the body (Priora 2170)

The hollow body sections, the underbody, the lower parts of the doors and pillars, as well as the joints of body parts, including spot welding, are most susceptible to corrosion. Corrosion develops most rapidly in hidden cavities and lower parts of the body when exposed to moisture, dirt, salts, and acids. In this regard, during the operation of the car, a special anti-corrosion compound is applied to additionally protect the internal surfaces and hidden cavities of the body, and sealing mastics are applied to the joints of the parts. The materials used for anti-corrosion treatment are listed in the table. 11.1. Auto preservative "Movil" or "Movil-2" is used for treating hidden cavities. It is recommended to treat cavities every 1–1.5 years. Auto preservative allows treatment of surfaces previously coated with nigrol or other oils, as well as rusty surfaces.

Protective lubricant NGM-ML is used for treating hidden cavities. This material is used to treat hidden cavities in new cars. Protective film coating NG-216B is used to cover parts of the car under the body. Bitumen anti-noise mastic BPM-1 is used to protect the underbody from corrosion and to reduce noise. Coating thickness 1.0–1.5 mm.

Plastisol D-11A is used to protect the underbody from corrosion, abrasive wear and for noise insulation. Coating thickness 1.0–1.2 mm. The bottoms of new cars are treated with Plastisol D-11A. Plastisol D-4A is used for sealing welded seams. Non-drying mastic 51-G-7 is used for sealing body joints. The anti-corrosion agent is applied to the internal cavities using air and airless spraying. Air spraying requires compressed air with a pressure of 0.5–0.8 MPa, a spray gun with a tank, hoses and extension nozzles for the gun. The best coating quality is achieved by airless spraying under a pressure of 4–12 MPa, which allows spraying materials of significant viscosity.