If boron nitride coating can
affectively increase the alloy thermal conductivity, the coating must
able to increase the alloy surface temperature. The higher the
alloy surface temperature with BN coating must means that boron nitride
coating affectively transferred (draw) the heat must inner alloy onto
the alloy surface. With fan or air flow to the alloy it should
able to efficiently cooling the surface temperature, in which
effectively achieve cooling the application. For example, if the
radiator able to transfer the hot coolant onto the core surface, then
cool down by stream of air, the BN coating must able to increase the
Due to difficulties
removing the vehicle radiator, I decided to use the simplest test
method, which applies BN coating onto the exhaust header of a 4-stroke
motorcycle engine. I can measure the before and after BN coating
temperature temperatures differences for comparison.
Start up the engine and
keep engine idle till the exhaust header maintain at the consistence
temperature. After 3 minutes the header surface temperature raise
to 175℃ and maintained at the temperature.
With engine at idle, I sprayed the
TopSpin boron nitride coating onto the engine header. Took total
of 30 seconds to complete the task.
Immediately re-measured the header
surface temperature (surface coated with boron nitride). 30
seconds ago I measured 175℃ and after BN coating measured the surface
temperature at 346℃. Wow! Unbelievable. Is this real?
The BN coated surface raise almost 2 times. All the staff members
were shocked by the result!
Immediately measured the surface 2
inches behind the coated area (not coated with boron nitride), I got
135℃. The result showed that BN coated header surface measured
twice of temperature than no coated with boron nitride. This
proves that boron nitride has excellent thermo conductivity that
effectively to transfer the heat inside the exhaust header onto the
surface. Boron nitride withstands temperature up to 1000℃~1800℃,
therefore the white bn coating did not discolor due to 346℃ of surface
BN coating on exhaust header might not be a proper application.
Cooling the header temperature might disturb the exhaust hot air flow
and negatively reducing the engine performance. The test on
exhaust header was only for convenience.
I recommend TopSpin boron nitride
coating onto turbo charge body, radiators, intercoolers, oil coolers,
transmission coolers, power steering coolers, etc. Any of
application that requires cooling will benefit with BN coating.
Greater result on BN coated surface will be even greater with airflow
such as fan or incoming air from vehicle moving.