The specifics which this general information covers is for the protection of chassis steel and body paneling
to Land Rovers but which of course can be applied to similarly constructed vehicles.
Buzzweld's primers and chassis protection coatings are fully rust-stabilising.
What does this mean?
One of the best examples to illustrate the speed at which corrosion can take place is as follows:
If you look at the surface of a brake disc on a car after leaving it overnight, you will almost certainly see a slight gingering (rust) of the surface caused by the hot disc being soaked in condensation as it cools. Buzzweld primers interrupt this corrosion cell and stabilise the corrosion from a fast reactive oxide to a much lower oxidation rate. This stabilisation continues long after the primer has been applied.
In order for the primers to operate correctly it is essential to remove as much of the loose and friable rust from the surface. This is done to ensure that the primer is only dealing with the surface corrosion that can be considered well bonded or firmly adherent. Scrapers, wire-brushes and flap wheels all remove loose rust to a high degree, but avoid the use of wire wheels at high rpm as they tend to polish the surface of the corrosion which can lead to low adhesion of the protecting primer.
When dealing with the preparation of the chassis or other rusting areas, ensure that any contamination like oil or grease has been thoroughly removed or again, low adhesion will result.
Application of the primers is by brush, as this has always proven to be the best method of working in the product into the rusted substrate, although roller and spray are additional options on most products.
If the corrosion level is deep, and deep pitting is still present after the correct preparation, it is essential that sufficient primer is applied to ensure that the peaks and valleys of the rust have sufficient paint to cover them with a good margin of film thickness. If there are any peaks of rust near the surface then spot rusting can occur.
Applying a thick coat of paint over unprepared and uncleaned rust will trap moisture/ oxygen under the thick coat of paint and this will allow subfilm corrosion to continue under the paint and unnoticed until the damage is done. Always in these circumstances, apply a primer that can be worked into the surface to prevent this.
It should be noted that Buzzweld CIO and Buzzweld two pack epoxy are reinforced using glass flake to create an abrasion resistant coating and to make the passage of moisture through the paint film even more difficult.
In all cases, ensure that all oil, grease and any other contamination has been removed
Scrape, preferably using a tungsten carbide scraper, and wire brush to remove all loose and friable corrosion back to a sound firmly bonded rust substrate. The use of flapwheels will help to bring down the overall thickness of the rust.
Buzzwelss RCP Primer, CIO Chassis Black and two pack epoxy are all applied by brush, or roller working the initial material into the rust to ensure total wetting out of the surface
Internal chassis protection
Buzzweld CCI400 / CCI450 is an internal chassis wax that has a greater vapour pressure than oxygen, consequently it is not essential for the wax to come into contact with every part of the surface area. It displaces all moisture from the area and dries to a firm, non sticky film that continues to displace moisture from the surface.
The Aerosol spray unit comes with a 600mm lance and a 125mm straw for easy application into the difficult access points. The Cavity Gun has a large bore 900MM lance