Underbody Coating

1. Under-Body Coating

• Under-Body coating are used to protect or prevent from the moisture which makes rust on the car.
• It helps from the poor roads condition, stones damage the parts of the car are protected.
• This underbody coating helps in protection from dust and moisture.

Steps Involved In Under-Body coating

• Pre-Treatment
• Electro Deposition
• Rust Proof Material
• Primer
• Topcoat

PRE-TREATMENT

• The first step in BIW for subsequent coating is the pre-treatment process
• Pre-treatment consists of cleaning the body surface to remove remaining oils from the stamping process
• And welding residues through three primary liquid dip processes of degreasing, conditioning and phosphating.

ELECTRO DEPOSITION

• Electo Deposition are done to prevent the corrosion.
• ED process is a non rust proof.
• ED is the main process of aviod rust.

RUST PROOF MATERIAL

• The third step is sealing PVC in underbody coating.
• The sealant is applied around and inside the doors, hood, trunk, and front dash.
• And onto the exterior and interior of metal joints and outer area of the back wheel well.

PRIMER

• The fourth coating step is the primer coating in surface.
• primer in solvent or spray or power coating.
• Primer is used to improve the paint enhance.

TOPCOAT

• The final step in the body coating process is to apply the topcoat.
• It consists of two layers the basecoat and clear coat.
• Base coat is the primary colour
• Clear coat is the protective coating

DIFFERENT TYPES OF UNDERBODY COATING

Rubberizied under body coating

• These coatings are easy to apply as well as protection from dust, moisture and dents.
• It provide soft finish

Wax under body coating

• Wax or paraffin-based undercoating is the cheapest.
• It is quickest option available in the market.
• But these coatings last only for one year of duration.

Asphalt based under body coating

• It is used for light commercial vehicle.
• Vehicle like buses, van, lorry etc.

polyurethane under body coating

• This coating is quick and easy to apply.
• This type of undercoating always requires surface preparations before apply.

Underbody Coating pros

• Reduces noise
• Extend the life of the vehicle
• covers small damages

Underbody Coating cons

• It is less helpful if corrosion is already present
• It add weight to vehicle
• It should reapplied every 5 to 7 years