Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ

finishing.com -- The Home Page of the Finishing Industry

  The authoritative public forum
  for Metal Finishing since 1989

-----

Insufficient cleaning of emulsion oil

2004

We are in the business of cold rolling and tin plating (electroplating). We often find that there are emulsion oil stains on the tinplated sheets inspite of input oil content of sheet being very low (70 mg/sq meter). The cleaning facility of steel is by NaOH without any mechanical arrangement.

what could be the possible reasons for this.

Thank you.

Bijay Mishra
rolling and plating - Jam, Jharkhand, India

Dear Mr.Mishra,

The NAOH is probably causing the problem. Pl try to use a mild alkaline cleaner or a weak solution of citric acid ⇦ this on eBay or Amazon [affil links] .

Ravi Sankar
- Chennai, INDIA
2004

(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories: