Electronic devices (cell phones, computers, etc.) can sometimes be salvaged after exposure to water, heat, or extreme conditions during an emergency. If the device itself can’t be salvaged, the data stored on it can possibly be restored. This is especially important if the data was not backed up at a safe offsite location.
Salvaging Motors, Switches, + Other Electromechanical Devices
Do not work on electrical equipment that has not been completely disconnected from a source of power. Doing so can result in serious injury or death.
Water conducts electricity, so do not work in an environment with electrical equipment and water unless the power has been completely disconnected. For equipment that has been hard-wired or cannot be unplugged, seek the assistance of a qualified electrician before proceeding.
Turn off – Unplug – Disconnect from power – Remove batteries!
Wet or damaged motors and electrical equipment are a serious safety hazard. In addition to being dangerous, powering up may permanently damage the devices.
Electrical Salvage Procedures
Make an evaluation of whether the item is worth the time to save. Take into consideration the value of the motor or tool, the age of the item, difficulty of replacement, and the extent of the damage.
It may make more sense to replace an older motor or tool with a more energy-efficient model. You may have to pay to replace bearings, or other components, so it the item is badly damaged or of marginal value, it is probably best to move on. On the other hand, a very expensive motor or tool may be worth trying to save.
Keep in mind that flood waters often contain corrosive chemicals that may cause deterioration of electrical components.
Remove excess water. Turn motors and devices so water can drain from vent holes. If motor is wet and covered with mud or other contaminants, rinse with clean water to remove contaminants. Be sure to wear protective gloves and a respirator. Flood water can be toxic. If you can, loosen covers to allow for better air flow and drainage.
Dry thoroughly. Place where air can circulate around and through the motor, tool, or switch. Fans can be useful. Do not apply excessive heat (heat guns or hair dryers) that may melt insulation or damage electronic components. Electrical contact cleaner or a water displacement spray that is designed specifically for electrical equipment may speed drying and protect surfaces. WD-40 will leave a gummy film, so do not use it on electrical components or mechanisms. It may take several days to completely dry electrical equipment.
Once dry, coat steel surfaces with a thin coat of light oil to prevent rust. If the motor is part of a larger tool or machine, dry the tool as above and coat all moving parts with oil to prevent rust.
Electrical motor specialists can often recover a motor by “baking.” This process may be as costly as replacement for small motors, but may be cost effective for larger, more expensive motors. Do not try this yourself as you may melt insulation or other parts that may cause the motor to become unsafe.
Useful Tools + Supplies
Electrical contact cleaner
Protective gear: rubber gloves, goggles, respirator