you need
  • Accurate scale and a transparent graduated vessel with water;calculator;a strong magnifying glass or a microscope, samples of bronze and brass chipped.
Start with a visual analysis.It is necessary to thoroughly clean the object and place the sunlight.As a rule, darker bronze brass, and, if we evaluate the color, the bronze goes to the "red" range (ie, from tan to brown) and brass in "yellow" up to white.However, this method is extremely imprecise, so go to the next step.
Analyze alloy density.We need a clear and accurate scale graduated vessel with water.Lowering a
n object in the water is determined by the volume weighted - a lot.Density is the ratio of body mass to its volume, translating into a format SI (kg / m).As a rule, denser bronze brass, with a line of separation is by value 8700 kg / cu.m.8400 - 8700 kg / m - almost certainly brass .8750 - 8900 - almost certainly bronze.
Finally, the structure of the alloy.It should be noted here that the necessary sample - subjects, the composition of which can be clearly identified as bronze and brass ;while samples must be chipped.
for proper analysis will need strong (better binocular) loupe or microscope (even children).The analysis is placed in the field of view of both the sample (cleavage), and the object of analysis.What to look for?The structure of the alloy - as they say, it "grain".As a rule, the bronze has a large and rough "grain" than brass .