In the face of rusty and stuck nails, forced disassembly may lead to broken nails or tool damage. This paper combines the mechanical principle and practical experience to classify and analyze the solutions of different scenarios to help you solve problems safely and efficiently.
First, the foundation disassembly method: no professional tools are needed.
1. Percussion vibration method (suitable for mild corrosion)
Tap the screwdriver handle vertically with a hammer for 5-8 times to loosen the rust layer.
With the wrench slightly twist left and right, gradually expand the loose range.
2. Chemical lubrication method (moderate corrosion)
Drop WD-40 rust remover along the thread gap and let it stand for 15 minutes.
Emergency plan: soak in cola or white vinegar to dissolve the rust by acid.
Second, advanced processing method: application of professional tools
3. Thermal expansion and cold contraction method (severe corrosion)
The gas torch heats the screw to dark red (about 500℃).
Drop sewing machine oil immediately, and use the temperature difference to expand the gap.
Note: Avoid plastic parts, and the screws need to be replaced after heating.
4. Impact grooving method (sliding wire to break nails)
Chisel a V-shaped groove in the nail head with a chisel.
Butt the flat screwdriver against the groove and hammer it counterclockwise.
After loosening, use the broken screw extractor instead.
5. Professional Tools Program
Nut breaker: hydraulic cutting rusty nuts, leaving the screw intact.
Induction heater: local accurate temperature rise to avoid damage to peripheral components.
Third, special scene handling
6. Nailing shoes/precision instruments
Saw a slot on the nail tip with a hacksaw and remove it with a screwdriver.
Soak the mixture of kerosene and engine oil (1:1) for 24 hours.
Safety operation guide
Wear anti-cutting gloves and goggles to prevent iron filings from splashing.
Avoid open flame for wooden components, and use electric hair dryer to heat them at high temperature.
After disassembly, use sandpaper+antirust oil to treat residual rust in time.
If you are injured by rusty nails, you need to thoroughly debride and vaccinate against tetanus. Mastering these methods can solve the problem of 90% rusty nails!
