![]() ![]() After seven days, I peeled back the coupons and found the weld site on the uncoated metal was covered with rust, but none had formed on the coated metal. On the first pair, I used weld-through primer on the second, I used none. ![]() To illustrate its importance, I plug-welded two pieces of steel together. Weld-through primer - The first product we need is weld-through primer, which can be brushed or sprayed on and works by coating the bare steel with zinc.What products can we use to restore corrosion protection? When zinc is exposed to moisture and air, it forms zinc oxide, which acts as a barrier against corrosion.Īs collision repairers, it’s up to restore this and other protective measures to vehicles that have been involved in a collision. This process coats one or both sides of the metal with zinc. Vehicle manufacturers have developed methods to protect the steel on today’s vehicles through a process called galvanizion. As rust begins to spread, it eats away at the steel, making it progressively weaker. Of those three areas, corrosion protection is the least understood - until you read this article, that is.Ĭorrosion is a chemical process that starts with iron, oxygen and moisture (electrolyte) to form the chemical compound ferrous oxide, more commonly know as rust. This means the repaired vehicle will behave in the same manner structurally if it’s involved in another accident and will have the same paint warranty and corrosion protection as applied by the vehicle manufacturer. The mission of the collision industry is to restore a vehicle that’s been in an accident to its pre-loss condition.
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