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.
April 14 marks the date 150 years ago that the first person was killed in the Civil War â but there's more to the story. The First To Die. The first shots of the War Between the States were fired at Fort Sumter in South Carolina's Charleston Harbor in 1861. Federal troops, under command of Maj. Robert Anderson, surrendered to Confederate Gen. P.G.T. Beauregard after an artillery bombardment that had begun on April 12.