eli5 How does razor blade dull on hairs when razor blades are made of steel and they are much higher on mohs scale?

Question

eli5 How does razor blade dull on hairs when razor blades are made of steel and they are much higher on mohs scale?

In: 4692

Answer 1

I do not know much of the science behind it, but I read somewhere once that evaporation of water on the razor blade and the corresponding corrosion is what causes most of the dulling.

I figured if I could preempt water evaporation with something that does not cause corrosion then I might be able to prolong the blade’s lifespan.

Nowadays I spray my razor blade royally with 70% isopropyl alcohol after usage and cleansing and it extended the lifespan of my blades by a factor of 4 or 5.

Can highly recommend this.