About 20 years ago, galvanized garage door torsion springs broke into the garage door parts market as an alternative to oil-tempered springs. Later, electro-coating on oil-tempered torsion springs augmented the buyer’s set of choices.
Because traditional oil-tempered garage door torsion springs have an oily residue owing to their oil-enabled manufacture, installers often leave dirty smudges from the springs on the doors, to the ire of the customer. Many technicians install about 6-8 springs per day on a tight schedule and need to keep moving with repair work. As such they find little time to wipe up, though some take the time. Galvanization came about to address this common and vexing issue.