1) Same grade and different tools are used but bench work is carried out in the same location.
2)  Fixture material was not prevented from corrosion causing agents.
3) Rust preventive oil was used in between operations but was not effective.
4) Wrapped in plastic covers and protected with Bubble and Foam wraps to prevent damages.
5) Spray rinse method is used but was not effective.
6) Improper cleaning on parts.
7) Passivation layer was damaged|1) Different zones for bench working(de-burring) of different material was not alloted.
2) Usually fixtures are preveserved with the help of Rust preventive oil(PX-24) which was less effective for fixtures stored long time.
3) Rust preventive oil previously used was not good in eliminating the moisture content from the part surface.
4) Plastic covers being non breathable caused built up of moisture content inside the cover which resulted in the initiation of corrosion before passivation.
5) Complete 360degree rinsing of cylindrical parts was not effectively possible when the parts are suspended individually in side the spray rinse tank.
6) Few parts / top portion parts were jigged using SS wire was above the rinsing nozzole level/ height.
7) Parts surfaces were rubbibg/contacting during and after the passivation process.|1) There was no occurance of similar issue before.
2) Previous rust preventive oil used to loose its rust prevention properties with 3 to 4 days where as the oil stays on the part for a week or more therefore it became hard to predict the cause of corrosion.
5) Since the parts are suspended from the hanger with wires there and were not attached to any rotary actions comlpete rinsing(360 degree) cleaning was not effectively possible.
6) There was no level indicator marked at the jigging/ loading station.
7) There was no sufficient gap between part to part during movement of parts from each stage(During wagon movement and other andling}|6) The level indicator sticker provided was fallen down and the same was not noticed.
7) Operator had not followed the material handling instructions as per SOP-PRD-09 during processing and there was no pictorial representation.|6) It was an adhessive sticker and not a permanent marking