How Does VCI Paper Work for Stainless Blanks and Castings?
VCI paper is kraft or specialty paper impregnated or coated with volatile corrosion inhibitors. When you layer sheets between stainless or special-steel blanks, wrap a light foundry part or line a carton and keep free airflow limited, inhibitor molecules vapourise into the small air space, settle on metal and form a thin molecular layer. That layer interrupts corrosion driven by moisture, oxygen and shop contaminants. When the next process opens the pack, the vapour leaves. Parts stay dry and clean. No greasy oil to strip before grinding, polishing or OEM receipt.
For Salem blank stacks that is the standard answer to "anti rust paper for steel sheets" and "stainless interleaving". For SIDCO foundry light parts at Suramangalam and multi-shape engineering kits at Kappalur, crepe conforms better than flat plain paper. Global guides (Zerust, Cortec, Armor) add the same rules: clean dry metal first; paper against the surface; closed outer pack; film when humidity dwell is aggressive. Those rules decide whether Western TN stores survive monsoon weeks without face bloom on blanks and flash rust on light castings.
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