To test the efficiency of 5% citric acid in removing rust from brass and copper coupons.
Date Run:
07/27/2023
Experiment Procedure:
Take 6 pre rusted brass and copper coupons and set them aside in trays.
Take citric acid crystals in a beaker to make the 5%citric acid solution. Stir until the crystals completely dissolve.
In this experiment,550 ml of the solution was prepared so 27.5g of citric acid crystals was used.
Once the 5% citric acid is ready, immerse the brass/copper coupons in it and leave it for 10 min.
After the 10 min, take out the coupons and give it a gentle wipe down with kimwipes to dry out the coupons of the citric acid .
The initial visual reading would be a 5 so accordingly on how much you think the rust has been removed, give a reading from 1-5(1- being rust has been totally removed, 5-being no change)
Trial Results:
The result of this experiment was no change. We started with an initial rating of 5 and the final rating would be a 5 as well.
Success Rating:
Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.
Conclusion:
The citric acid did not seem to remove any rust from the coupons. Possible solutions could be increase the concentration of citric acid or use external conditions like heat, ultrasonics.
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