Acid Spot Test
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Abstract
In principle, in order to identify the type of metal, metallurgy process is involved. But, chemical knowledge is also important to simplify the selection of a standard set of metals to be used with detailed chemical analysis tools. Using the chemical basic testing tools, Acid Spot Test, can confirm the type of metal, compared to the standard, in preliminary detection process.
It starts with the magnetic separator which can tell whether or not the metal is steel. If the examined metal has magnetic attraction capability, it is steel. If it does not have the capability, the metal is not steel. After that, make the surface of the metal clean by using sandpaper before applying chemical testing procedure. Repeat the process until the type of metal is determined. Based on past experiences, Acid Spot Test has proven to be effective. It leads to the right standard metal set used in the detailed chemical analysis tools and can report the chemical composition of that metal accurately and meets the international standards.
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References
เอกสารวิจัย โครงการวิจัยและพัฒนาโปรแกรมฐานความรู้ในการพิสูจน์ทราบประเภทของโลหะ. (2543).
Handbook of Comparative World Steel Standards, The International Technical Information Institute.(1985).
ASTM Special Technical Publication 550, Non Destructive Rapid Identification of Metal and Alloy By Spot Test, 2nd Printing, July 1981, Ohio, USA.