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.
For more information about the Postal Service, go to usps.com and usps.com/postalfacts. Last-minute tax filers are likely to have one more item on their checklist â how to secure a coveted April 15th Postmark. On April 15, all area Post Office retail windows will be open for regular hours only.We will not be staying open late. However, if you absolutely must wait until the last minute to mail a return, the following offices will accept prepaid, prestamped tax returns for postmarking only.or more information about the Postal Service, go to usps.com and usps.com/postalfacts. Last-minute tax filers are likely to have one more item on their checklist â how to secure a coveted April 15th Postmark. On April 15, all area Post Office retail windows will be open for regular hours only.