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.
On August 10, 1977, 24-year-old postal employee David Berkowitz is arrested and charged with being the âSon of Sam,â the serial killer who terrorized New York City for more than a year, killing six young people and wounding seven others with a .44-caliber revolver.