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.
In 1775, Goddard became the first woman postmaster in the country (in Baltimore), and in 1777 she became the first printer to offer copies of the Declaration of Independence that included the signers' names. In 1789 Goddard opened a Baltimore bookstore, probably the first woman in America to do so.