Effect of Cloride on HR Steel Coil in Pickling Process

Depends how much rust you can tolerate after rinsing.

I'd perform rinse tests using varying amounts of chloride, until the desired results are obtained.

Otherwise a final DI water rinse is called for.

Milo?

What kind of steel?

Austentic Stainless Steels will crack (Chloride Stress Cracking) and I wouldn't put any water near them with more than 30ppm Cl.

As said by the "Gold Medal Poster" (he is always first ) in carbon steels you will get accelerated corrosion. Chlorides increase the conductivity of the water, so accelerated corrosion. Not an issue during the pickling but something to consider for passivation and rinsing.

If you are doing this on a regular basis you might want to consider an RO unit for your rinsing water, or buy some low chloride water from your local power station or anyone else that has a steam plant.

I agree, Although my experience was with pickling hot-band carbon steels, using rinse water with >30 ppm Cl is problematic for rust. With carbon steels, immediate rinsing of strip and provision of a "barrier" coating such as by oiling (without any line-stops) after pickling is absolutely necessary; I have personally observed major rust development on Hot Band surfaces within 30 sec. Advise to review texts on corrosion as it is a solid science which has been fairly widely researched.

That value would appear to be excessively high for drinking water, which usually falls in the 1- 10 ppm range (in the UK).