Our INTERCOOL glycol fluids meet ASTM D-1384 corrosion standards and contain a highly effective corrosion inhibitor and pH buffer package to ensure excellent long-term mixed metal system protection.
astm d 1384 pdf 23
Tests on the corrosion resistance of metal testpieces are carried out by immersion in a solution in water of the anti-freeze composition prepared previously. The qualities of the metals or alloys used, and also all the operating conditions of these tests are defined by Standard ASTM D 1384/70. The corrosion is demonstrated by the variation in weight of each testpiece (expressed in milligrammes) at the end of a given time. The results are given in Table I.
The results of Examples 20 and 21 and those of Example 16 are collected in Table VI. An examination of this table shows that the associations of saccharose with the sodium salt of azelaic acid (Example 20) and saccharose with the sodium salt of sebacic acid (Example 21) have a remarkable action as corrosion inhibitors for all the metals and alloys examined at very low acid concentrations. TABLE 1 __________________________________________________________________________ Polyol Dicarboxylic acid % by % by Variations in weight in mg per testpiece (ASTM D 1384/70) Example Type weight Type weight Copper Weld Brass Steel Cast iron Aluminium __________________________________________________________________________ 1 Sorbitol2.0 Adipic acid2.35-1 -1 -2 +1 -2 +32 " 2.0 Sebacic acid2.35-1 -1 -2 0 0 -13 " 2.0 Succinic acid2.35-1 -1 -1 0 -2 04 " 2.0 Azelaic acid1.50-3 -3 -2 ?1 +2 +25 " 2.0 Mixture of acids2.35-5 -3 -3 +3 -6 +2 __________________________________________________________________________ 2ff7e9595c
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