VolSolv Series for Degreasing,Chemical Cleaning & Passivation

When De-Greasing and /or Chemical Cleaning is a necessary requirement, it has to be a highly engineered process with careful selection of the appropriate choice of chemistry. VGI utilizes it's VolSolv Series of formulations to approach all types of deposits and contaminants.

Added costs grow rapidly with no or poorly applied chemical cleanings.

VGI's VolSolv Series of chemical formulations are designed to remove inorganic residue as rust, silica and millscale and organic deposits such as cutting oils, etc and utilizes chemical compounds which are determined by the needs of your specific project.

Failure to remove this inorganic residue results in pitting and further corrosion and eventually, tube failure. Recent investigations of tube failures on relatively new HRSGs have shown that on some units, heavy deposits of scale are located at the tube to header weld area. This localized heavy corrosion is the result of the localized post weld heat treatment of the tube to header welds. It is common practice for HRSG fabricators to locally heat-treat these areas of the harp sections to avoid excessive corrosion of the finned surfaces of the tubes.

The presence of the heavy deposits may result in reduced natural circulation in the tubes and may also provide a site for under scale corrosion. When such localized heavy deposits of mill scale are present, special care must be taken during chemical cleanings to insure that sufficient chemistry and contact time is provided to completely remove these deposits.

VGI engineers create a procedure to ensure complete chemical cleaning of your project, based on the condition of your systems. Chemical analysis is followed by the engineer's determination of the best cleaning method and appropriate chemistry for complete cleaning.

Chemical cleaning is followed by passivation of the surfaces. Sometimes a nitrogen base, sometimes passivation takes another chemical form; our engineers recommend the method best suited to your project.

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