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Trial Number 1

Trial Purpose:

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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