particular specifications (road works) - CIDCO Maharashtra Ltd.

CIDCO OF MAHARASHTRA LTD
C.A.No.01/CIDCO/SE(KHR)/EE(KHR-I)/2010–11 Pg. No. 417
shall be placed on the panel and the vacuum pick up nozzle kept in
position. The counter shall be set in position. The vacuum, pick up and
turn table of the abrader shall be fixed for 1000 cycles. After 1000
cycles loose abradings remaining on the test specimen shall be
measured for finding the loss in weight. The weight loss shall not
exceed 100mg. The test shall be conducted on duplicate specimens.
14.10.4 Test Procedure D:
Chloride Tolerable Limit:
10mm dia. cement polymer coated rod of length 10cm shall be used.
Bottom edge of the coated rod shall be sealed using lacquer. Then test
specimen is kept immersed in 0.04 N NaOH + 10,000 ppm chloride
and potential is monitored using high impedance Multimeter against
suitable reference electrode such as saturated calomel electrode. After
getting stabilized potential, using appropriate current regulator (0-
100mA), the test specimen is anodically polarized at a constant current
density of 290 uA/cm2 using a platinum/stainless steel/TSIA/Polished
mild steel as cathode. Potential with time is followed for 5 minutes. At
the end of 5 minutes, no rust spots shall be observed on the coated
rod.
14.10.5 Test Procedure E:
Chemical Resistance of the Coating:
The coated rods (any diameter) of length 30cm shall be used in this
test. The bottom edge of the coated rods are to be sealed using
lacquer. Transparent PVC cylindrical container shall be used. 3M
CaC123M NaOH, Saturated Ca (OH) 2 and distilled water are prepared
as individual test solution and filled in the separate container up to the
half of its height. Then the coated rods are kept partially immersed in
the test solution so that they are in long term contact with both the
liquid and vapor phase of the test solution. The test shall be conducted
for 45 days. The coating should not blister, soften or disband during
this period.