A six month laboratory study was conducted to determine the corrosion performance of C122 in twenty-six commercially available heat transfer liquids. This laboratory study was performed under simulated solar service conditions including daily thermal cycling, relative metal to fluid motion and biweekly sample exposures to temperatures equivalent to the level reached in a stagnating solar collector. For three of the liquids tested, significant localized attack was observed. In all other cases, the heat transfer liquids produced only low levels of uniform penetration with no significant localized attack.

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