Apparatus for applying disparate etching solutions to interior and exterior surfaces

A cleaning system comprising:

• a. a tank-type cleaning vessel;
• b. an article integrated with and disposed within the tank-type cleaning vessel and having a first article surface and a second article surface, the article dividing the tank-type cleaning vessel into a first vessel portion defined, at least in part, by the first article surface and a second vessel portion defined, at least in part, by the second article surface;
• c. a contamination layer disposed on the first article surface;
• d. an etchant contained within the first vessel portion and wetting the contamination layer;
• and
• e. a fluid different from the etchant and contained within the second vessel portion and separated from the first vessel portion by the article;
• f. wherein the article includes a first open end and a second open end opposite the first open end.

A cleaning system comprising:

• a. a tank-type cleaning vessel;
• b. a ring-shaped article integrated with and disposed within the tank-type cleaning vessel and having a first article surface and a second article surface, the article dividing the tank-type cleaning vessel into a first vessel portion defined, at least in part, by the first article surface and a second vessel portion defined, at least in part, by the second article surface;
• c. a contamination layer disposed on the first article surface;
• d. an etchant liquid contained within the first vessel portion and wetting the contamination layer, the first vessel portion filled to a first level with the etchant liquid;
• and
• e. a second liquid contained within the second vessel portion and separated from the first vessel portion by the article, the second vessel portion filled to a second level with the second liquid;
• f. wherein the article includes a first open end and a second open end opposite the first open end;
• and
• g. wherein the first vessel portion contains a first volume of the etchant liquid and the second vessel portion contains a second volume of the second liquid, the cleaning system further comprising at least one volume-displacement element displacing a portion of at least one of the first and second fluid volumes.