Stainless Steel Chemical Composition Test Fluid, patent CN1793869A, is a solution for detecting the composition of alloys, particularly molybdenum and nickel content differences. The N8 analysis test fluid, composed of sodium hydroxide, EDTA, potassium sodium tartrate, hydroxyamine hydrochloride, acetone oxime, and distilled water, is used to test 304 stainless steel. The process involves applying the solution to the surface of the metal sample, passing an electric current between the solution and another electrode, and observing the resulting color. A normal reading will show a red color, indicating a nickel content of 8% or higher.
The minimum nickel content in 304 stainless steel is 8% to 10.5%. If a sample is found to have a lower nickel content, it is not 304 stainless steel. This test fluid is useful for factory testing and recycling stainless steel. It can be purchased on Taobao, a popular online marketplace. However, some stainless steel manufacturers may claim that the test fluid is inaccurate or toxic, trying to deter customers from using it.
This test fluid has been widely used by science enthusiasts, who can purchase it on online marketplaces. However, its accuracy and reliability should not be taken for granted. Further research is necessary to ensure the validity of this method.
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