Chemical Forums

Please login or register.

Login with username, password and session length

Sponsored links

Pages: [1]   Go Down

Author Topic: Galvanized Iron (Zinc Coating Measurement)  (Read 1162 times)

0 Members and 1 Guest are viewing this topic.

kavin011

  • Regular Member
  • ***
  • Mole Snacks: +0/-0
  • Offline Offline
  • Posts: 9
Galvanized Iron (Zinc Coating Measurement)
« on: September 18, 2018, 01:26:00 AM »

Dear All,

     We are using Galvanized Iron wire as a raw material in our plant.As per BS EN standard we can measure the Zinc coating percentage of that wire. The procedure as follows(gravimetric method):

Reagents:
The stripping solution shall be hydrochloric acid with a concentration of 1.13 g/mi to 1.19 g/ml by density to which an appropriate inhibitor is added.Dissolve 3.2 g of antimony (III)Chloride or 2 g of antimony (III)oxide in 500 ml concentrated hydrochloric acid (1.19 g/ml).Dilute this solution with distilled water to 1 litre.Hexamethylenetetramine,formaldehyde or any other suitable inhibitor may be used.
Note: It is recommended that preference be given to inhibitors which do not contain antimony.


1) actually Zn coating  is dissolved in Hcl acid (37 %) ,but why these many compounds we need to use like SbCl3 /Sb2O3/C6H12N4/HCHO ?

2) My another doubt is after removing the Zn coating from iron , that iron also will dissolved into Hcl? thats why they using these many compounds? please clarify because Fe also easily dissolved into Hcl. If yes means kindly let me the occuring chemical reactions from that procedure.


 
Logged

Borek

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Mole Snacks: +1620/-395
  • Offline Offline
  • Gender: Male
  • Posts: 24734
  • I am known to be occasionally wrong.
    • Chembuddy
Re: Galvanized Iron (Zinc Coating Measurement)
« Reply #1 on: September 18, 2018, 02:08:24 AM »

Please don't cross post.

Locked.
Logged
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info, pH-meter.info, PZWT_s1

Pages: [1]   Go Up
 

Mitch Andre Garcia's Chemical Forums 2003-Present.

Page created in 0.104 seconds with 23 queries.