Galvanic corrosion is a process that degrades metals electrochemically. This corrosion occurs when two dissimilar metals are located in contact with each other in the presence of an electrolyte, such as salt water, forming a galvanic cell.
But the memories of that tragic day 25 years ago are still vivid to many in Edmond. On Aug. 20, 1986, gunman Patrick Henry Sherrill shot and killed 14 co-workers, wounded six and then took his own life inside the post office where he worked.
SAN FRANCISCO (CBS SF) â For Bay Area taxpayers who procrastinated until the April 15th deadline and wonât file electronically, a handful of post offices will be open Wednesday evening.Most post offices will be open during regular business hours.Lines at post offices have shrunk considerably in recent years with the rise of online filing. Post office information courtesy U.S. Postal Service.ost post offices will be open during regular business hours. Lines at post offices have shrunk considerably in recent years with the rise of online filing. Post office information courtesy U.S. Postal Service.