Der Pharma Chemica
Journal for Medicinal Chemistry, Pharmaceutical Chemistry, Pharmaceutical Sciences and Computational Chemistry

All submissions of the EM system will be redirected to Online Manuscript Submission System. Authors are requested to submit articles directly to Online Manuscript Submission System of respective journal.

Abstract

Metal attack and dissolution of scale by mixtures o f acids

Author(s): Shalini Srivastava

Calcareous deposits are formed on boiler surfaces b y continuous use of natural water. Scales formed by natural water cannot be removed easily by using single acid . Mixtures of acids were taken to observe metal att ack by acids and descaling. Experiments were conducted in such a manner that the quantity of one acid was gradually increased and the ratio of two acids was kept constant. When HNO 3 concentration was changed, lower concentration decreased rate of corrosion but higher quantities i ncreased it in HCl + H 2 CrO 4 mixture. Results obtained with different concentration of HCl showed acceleration in rate of corrosion in lower concentration of HNO 3 , H 2 CrO 4 mixture. Even in higher concentration weight loss was appreciable. In H 2 CrO 4 HCl , HNO 3 ( 90+5+5 ) respectively mixture is advantageous i.e. corrosion rate is mini mum 0.064 gm/dm 2 and scale dissolution is maximum (0.14 gm/minute).:


PDF

FIND ARTICLES
SCImago Journal & Country Rank
Recommended Conferences
bornova escort karşıyaka escort osmangazi escort buca escort anne porno fetiş porno anal porno bartın escort burdur escort eskişehir escort escort izmir bursa escort porno escort bayan