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 April 14, 1865, Abraham Lincoln was shot at Fordâs Theater in Washington, D.C. Heâd die the next morning. But also on April 14, 1865, Lincoln signed into law a piece of legislation which created the Secret Service â the law enforcement agency charged with defending the President from, among other things, assassination attempts such as the one that befell Lincoln that evening.