Welded fuel tank having a magnet for collecting weld spatter and method for collecting weld spatter

A fuel tank for a vehicle comprising:

• a container having a seam weld and a bottom surface;
• and
• a magnet disposed inside the container and having a surface in rolling contact with the bottom surface of the container for collecting magnetic particles in the container.

A method for cleaning a container for a liquid having a seam weld comprising:

• placing a magnet shaped so as to roll about the bottom of the container and having a surface in rolling contact with the bottom of the container into the container after formation of the seam weld;
• and
• exerting a force on the container prior to introducing a liquid into the container to cause the magnet to roll around the bottom of the container and collect magnetic particles.

A method of cleaning a container having a seam weld comprising:

• placing a magnet shaped so as to roll on the bottom of the container and having a surface in rolling contact with the bottom of the container into the container;
• and
• exerting a force on the container to cause the magnet to roll about the bottom of the container.