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.
List: More Mass Shootings Occurred In U.S. In 2015 Than There Are Calendar Days In The Year. MARIETTA, GA - JULY 21: Justin Vidicon, a high school friend of Lance Cpl. Skip Wells, reflects for a moment at a memorial site for the fallen Marine at Sprayberry High School on July 21, 2015 in Marietta, Georgia.