Protecting Auto Body Parts from Rust / Car anti-corrosion
What causes rust?
Moisture, dirt, industrial fallout, salt air, grit, cement dust, crop sprays and manures all help to speed corrosion.
Rust, an all-year-round menace in coastal areas, gains a foothold in any moisture or rust traps that feature in the design of modern car bodies. Door panels—particularly those of the driver’s door—are the most vulnerable components of a car.
Any design which allows mud to collect on components under the vehicle invariably tends to encourage rust.
Rustproofing treatment
All new cars manufactured in South Africa are given a fairly extensive rust- proofing treatment before leaving the factory. A survey carried out by AA technical personnel during two years on some 1400 vehicles up to five years old failed to show any measureable benefit for having new vehicles treated with additional rustproofing procedures. However, when factory rustproofing has been removed or damaged suchas in an accident or during the course of welding or body repairs, it should be replaced as quickly as possible.
How to prevent rust
Leaks to the bodywork or boot should be corrected as soon as possible and carpets thoroughly dried out. A close watch should be kept on window-sealing rubbers, and drain holes in doors kept clear. Wash the vehicle regularly with fresh water and dry thoroughly. Never park a wet car in a warm garage with all the doors and windows shut. This creates a sweat box with ideal conditions for hastening corrosion. Let the car dry in the open or drive it for a kilometre or so immediately after washing. Construct the garage so that it is well ventilated.
Check the underside of the vehicle periodically and wash off any mud `poultices’ that may have formed on protruding bolts etc.
AA Technicians, probing into the causes of rust on new cars, have found many instances of internal rust developing in body sections that had been drilled or filed to take radio speakers and aerials. When this is necessary, use a vacuum cleaner or compressed air to clean out metal filings. Repair areas immediately where the paintwork has been scratched or chipped and wax the paint regularly. Avoid attaching metal plates or badges to the bodywork.
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