Electro Spot Testing Kit for Alloys

Brief Description

Properties and applications of various alloys depend upon their alloying elements. To identify and estimate the elements, conventional methods of chemical analysis and instrument techniques are being used which are costly, time consuming and mostly destructive.

The alloying elements, which can be identified, are Cr, Ni, Mo, W, V, Co, Mn and C. The alloying elements present can be identified by the development of different colours like pink, light pink, dark violet, amber, sky-blue, gray and bluish gray.

The electro spot testing kit is accomplished by electrically dissolving a minute amount of metal ions from the unknown material in a chemically treated test paper. Few drops of specified electrolyte are added over the test paper. The wet filter paper is then pressed in between aluminum cathode and the unknown metal serving as anode. Some amount of current is then allowed to flow through the metal surface for a few seconds in order to extract a minute amount of metal ions on the test paper. Specific reagents are then added in sequence to develop a well defined, easy to identify colour spot, which represents the known alloying element. The colour intensity will indicate the semi-quantitative analysis of that element.

Salient Features

• Simple rapid and easy identification
  
• Positive identification of any size and shape of material
  
• Qualitative and semi-quantitative
  
• Portable and non destructive testing
  
• No trained person required for operation
  
• Economical and reliable
  
• Refills of chemical regents easily available
  

Applications

• Quality control
  
• Inspection of incoming metals
  
• Metallurgical laboratories
  
• Machine and welding shops
  

Contact:

Central Scientific Instruments Organisation,
Chandigarh
Website: http://www.csio.res.in/