SMALL SCALE PRODUCTION OF INC SULPHATE AND ITS APPLICATION
Abstract
- Zinc sulphate is a water soluble inorganic compound. It can be prepared by treating virtually any zinc containing material (metal, minerals, oxides) with sulfuric acid followed by evaporation and crystallization. Zinc and its alloys have been used as a protective and decorative coatings over a variety of metal substrates. In this research, commercial grade zinc oxide was used as raw material for the preparation of zinc sulphate. Moreover, a make-shift stainless steel reactor was constructed for the production of zinc sulphate. Prepared zinc sulphate was used in zinc electroplating process. The purity of zinc oxide was found to be 98.58(% w/w) by volumetric analysis method and 99.953 (%w/w) by EDXRF method. The maximum yield of zinc sulphate 79.50 (%w/w) was obtained by treating 10 g of zinc oxide with 75 mL of 3 M sulphuric acid. Prepared Zinc sulphate was identified by X-ray Diffraction (XRD) and the purity and composition was determined using Energy Dispersive X-ray Flourescence (EDXRF). 2 kg of zinc sulphate per batch was produced from 488 g of zinc oxide by using a make-shift stainless steel stirred tank reactor. Iron sheet was electroplated in the zinc sulphate solution using different parameters by varying the voltage, current and electroplating time. The acceptable bright colour and suitable thickness was obtained at 6V, 5A, 15 min electroplating time. The corrosion rate of selected zinc coated layer in artificially simulated environments (tap water, 3.5 % NaCl solution and dilute acid solution) and standard salt spray test (ASTM B 117) was also studied. The selected zinc coated layer give 72 hr protection for salt spray test. The surface morphology of the zinc coating before and after corrosion were studied by Scanning Electron Microscopy (SEM)
Collections
Download
Year
- 2018
Author
-
Ohnmar Kyi
Subject
- Chemistry.IC
Publisher
- Myanmar Academy of Arts and Science (MAAS)