Sodium Metasilicate Fact Sheet for Soldering
Sodium metasilicate is a white granular compound used as a cleaning agent for metal workpieces prior to finishing or soldering. Clean surfaces are necessary for effective soldering. Sodium metasilicate is typically combined with other components for cleaning.
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Alkaline Cleaning
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Sodium metasilicate is combined with additives and surfactants to make a mild alkaline detergent solution, which lifts or displaces soil, rust, scale and oxides from the workpiece. Unlike organic solvents, the detergent does not break down the deposits.
Benefits
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Unlike acid solutions, the sodium metasilicate detergent does not cause hydrogen embrittlement, which can occur when hydrogen penetrates and weakens metal. Generally, the greater the strength of a detergent, the faster it cleans, according to the North Carolina Division of Pollution Prevention and Environmental Assistance.
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Other Facts
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As an alkaline substance, sodium metasilicate can irritate the skin and mucous membranes, causing pain, burning and coughing. Care should be taken not to breathe in the powder, and contact with the eyes should be avoided.
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