An attempt to protect the
tank wall from corrosion can consist of lining it with a
stainless steel sheet, with weld overlay or metal spray
but as a consequence can result in galvanic corrosion
of the carbon steel wall adjacent to the stainless steel
lining. Depending on the electrical conductivity of the
liquid and anticorrosive measures taken the corrosion
can take the form of a groove or of a more shallow but
extended removal of carbon steel. In order to control
the progress of corrosion inspection at regular intervals is
needed. A deep groove can be filled by welding. If a
stainless steel filler metal is used the groove forms
adjacent to the repair weld.