Because the rust is precipitated as a result of secondary reactions it is porous and absorbent and tends to act as a sort of harmful poultice which encourages further corrosion. For other metals or different environments different types of anodic and cathodic reactions may occur.
Veterans benefits and the Reserves. Each of the military services has a Reserve branch. Thereâs an Army Reserve, Air Force Reserve, Navy Reserve, Marine Corps Reserve, and Coast Guard Reserve. Like the active-duty forces, the Reserves fall under the auspices of the Department of Defense, so they are federal agencies.
The other services don't do this (to my knowledge), but basically, active duty = you're a Marine/soldier/sailor/airman 24/7. Reserve: this is what the NG is considered, and you can also enlist in any branch of service as a reservist.. Reserve is the one weekend a month, two weeks a year deal. You have a normal job that you go to, but one weekend a month you need to go to your command and do stuff there.