Underbody Coating

$ AIM:

* To give a report about underbody coating and its types,

$ ABOUT UNDERBODY COATING:

* In the process of painting several layers of coating are given over the surface of the car to make it suitable to withstand damage occuring by the mechanical and chemical exposure

* This coating process require some addition coating or different coating process depanding upon the purpose for which it is served

* The coating processwhisch is done to underbody comaponents between electrode deposition and primer coating process is known as underbody coating

$ TYPES OF UNDERBODY COATING:

* Rubberizied underbody coating

* Polyurthane underbody coating

* Wax (or) paraffin based underbody coating

* Asphalt-based underbody coating

$ Rubberizied underbody coating:

* Rubberizied underbody coating is easy to apply and offers sound-cushioning as well as protection from dust, moisture, and dings or dents.

* In addition to your undercarriage, rubberized undercoating is also safe to use on wheel wells and quarter panels, and dries to a soft rubbery finish that prevents further rust, damage, or moisture seeps. The coating can be painted over and, if necessary for bodywork, can be easily removed with an undercoating removal spray.

* Overall, rubberized coating is generally the best option for protecting your vehicle's undercarriage, as it provides the simplest and best protective measures against rust and moisture.

$ Polyuthane underbody coating:

* Is easy to apply and offers sound-cushioning as well as protection from dust, moisture, and dings or dents.

* In addition to your undercarriage, rubberized undercoating is also safe to use on wheel wells and quarter panels, and dries to a soft rubbery finish that prevents further rust, damage, or moisture seeps. The coating can be painted over and, if necessary for bodywork, can be easily removed with an undercoating removal spray.

* Overall, rubberized coating is generally the best option for protecting your vehicle's undercarriage, as it provides the simplest and best protective measures against rust and moisture.

$ Wax (or) paraffin based underbody coating:

* A paraffin-based undercoating will be the cheapest and quickest option available with which to protect the undercarriage of your vehicle. However, keep in mind that it will wear off quicker than other types of undercoating and will need to be stripped and reapplied at least once every year.

*Wax-based undercoatings never truly harden. During application, they drip or flow into seams and cracks to provide protective properties. They are usually available in a spray gun canister or in an aerosol can and offer at least a base protection in moderately humid climates.

% Asphalt-based underbody coating:

* For standard vehicles, any of the aforementioned types of undercoating will provide sufficient protection. For large trucks and heavy machinery, asphalt-based undercoating provides a bit of extra durability against rocks, chips, and moisture.

* Asphalt-based undercoating generally contains a little bit of rubberized material that sets up firmly and also helps soften noise. Generally sold in five gallon containers, this type of undercoating also needs more cure time than the other three, and is NOT paintable, making it best to use only for undercarriages.

$ ADVENTAGES:

*It is done to prevent the underbody components of the automobile from corrosion ,chipping(scratches and wear occuring whilr rocking and stone strikes ),heat resistance ,noise resistance,vibration and elimination of the water leaks ,poly vincyl chloride (PVC) and acrylic resins are the material used in the underbody coating

$ DISADVENTAGES:

*The cost of the underbody coating will increase depanding upon the surface area introduced for underbody coating process.

$ Modern procedure for aotomotive coating process:

*Pre-treatment - the excess material is removed and the surface is cleaned to make it suitable for the coating process. the dirt and welding residuce is cleaned and removed during pre-treatment.

*The pre-treatment also consists of 4 stages [ hot water ,degreaser, surface conditioner, phospahte ]which are done electrode deposition process

*Electrodeposition - The electrode deposition coat provides rust and corroision protection it is done over body in white. the metal underbody and the frames are coated to prevent corriosion while areas that not coated are printed before applying the additional coating

*Rustproof material[sealer/PVC] - The underbody coating has some specific ,adventages when compared to that of electrode deposition the underbody coating has the noise reduction , vibartion reduction, and anti chipping properties in addition to that of underbody coating

*Primer - The primer is applied over the top body of the car improve weather resistance, improve apperanance ,chipping resistance , improve adhesion between electrodeposition coat and topcoat , and reduce the violte organic copunds that cause the atmosphric pollution

*Topcoat - The topcoat has two stages they are base coat and clear coat . the base coat has the primary clearing plegment,while the clearcoat provides a protective coating against enviroment effects ,ultraviolet lifht degreadtion,unmateched color retiotion and a smooth even finish