Method of surface treatment and an apparatus used in said surface treatment

An apparatus for surface treating articles, comprising:

• a dipping tank having a first end and a second end, said dipping tank being adapted to be filled with a treating liquid;
• means for moving articles to be treated through said tank in a first direction from said first end toward said second end;
• an overflow tank adjacent said first end;
• and
• first treating liquid spray means positioned over said tank and above the level of said treating liquid at said first end, second treating liquid spray means positioned below the level of said treating liquid at said first end, said first and second spray means each comprising at least one riser extending parallel to the surface of said liquid and to said first direction, and spray nozzles extending in said first direction on the upper surface of said risers so as to vertically spray said liquid, wherein said first and second risers and said means for moving are constructed and positioned so that said articles are sprayed only within a 30 second period before being dipped in said treating liquid and a 30 second period after being dipped in said treating liquid.