Technical Data and Questions > Independent Salt Spray Test of Bronz-Glow Husky Green Fin Coil Protector

Independent Salt Spray Test of Bronz-Glow Husky Green Fin Coil Protector

The a/c equipment manufacturer embarked on a salt spray evaluation program. They evaluated condenser coil coatings from several other vendors. Upon conclusion of the testing Bronz-Glow was informed of how its coating performed.

The test was based on ASTM B117.85. The test consisted of continuous exposure of the coated coils to 5% salt solution at 95° F for 6,300 hours (37.5 weeks). The coils were removed from the salt chamber to dry on the weekends. The initial test duration was scheduled for 3,000 hours at the end of which the test would have been terminated. Testing of Bronz-Glow Coil Coat, at Bronz-Glow’s request, went beyond this target stop period of 3,000 hours to 6,300 hours.

The coated coils were of 1,2 and 3 row enhanced fin coils with 16 fins per inch. The fins were made from 0.0047 aluminum materials, the hairpins were made from .012 wall rifled copper tubing, and the end-sheets were made from galvanized steel.

After 6,300 hours of evaluation, the Bronz-Glow Coil Coat demonstrated excellent resistance to general and galvanic corrosion. Upon close inspection the fin and tube area were in excellent condition however, there were some small bubbles beginning to appear on the galvanized end-sheet. This is considered minimal based on the longevity of the test and that no corrosion was found at the junction of the aluminum fin and copper tube or galvanic intersect.