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Trial Number 0

Trial Purpose:

To test the efficiency of 2% citric acid in removing rust from brass and copper coupons.

Date Run:


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 2%citric acid solution. Stir until the crystals completely dissolve.

In this experiment,550 ml of the solution was prepared so 11g of citric acid crystals was used.  

Once the 2% 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.


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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