Tuesday, March 8, 2011
Blog 43 3/6/11
I learned that the oxide that aluminum makes is a gray layer that forms above the metal. In my experiment, there is gray in Drano, and salt water. Though there is not much weight change with salt water, the surface observation shows that there is corrosion. However, one should take in mind that corrosion is a long process that takes years.
Blog 42 3/5/11
The aluminum is corroding much more with the base than with the acid, just as my research said. All my research comes from the books that I used in my research paper. However with aluminum, had much less corrosion potential for acids. Also in aluminum, the corroded layer is supposed to protect the aluminum from further corrosion because it forms a tight layer of oxide. Water, Clorox, Ammonia, Salt Water, and SA are not corroding well.
Blog 41 3/4/11
The Steel Weights & pH 3/4/11:
A: 23.3g pH 9
B: 25.7g pH 10
C: 25.3g pH 10.3
D: 25.6g pH 8
E: 25.9g pH 6.5
F: 25.4g pH 5The corrosion seems to have stopped in all but clorox, the ammonia is still a blue color, and the salt makes a slightly darker steel, the shiny protective original layer is gone. Even water has some corrosion. The Drano has the least amount of corrosion, even less than water. The clorox definitely has the most surface corrosion.
A: 23.3g pH 9
B: 25.7g pH 10
C: 25.3g pH 10.3
D: 25.6g pH 8
E: 25.9g pH 6.5
F: 25.4g pH 5The corrosion seems to have stopped in all but clorox, the ammonia is still a blue color, and the salt makes a slightly darker steel, the shiny protective original layer is gone. Even water has some corrosion. The Drano has the least amount of corrosion, even less than water. The clorox definitely has the most surface corrosion.
Blog 40 3/4/11
Aluminum Weights 3/4/11
A: 4.1g pH 8
B: 4.1g pH 10
C: 4.3g pH 11
D: 4.5g pH 6
E: 4.5g pH 6
F: 4.3g pH 4
However, Drano seems to be drastically bringing the metal down, and the effect is instantaneous. Some of the aluminum surface corroded, and left a white substance in the Drano.
A: 4.1g pH 8
B: 4.1g pH 10
C: 4.3g pH 11
D: 4.5g pH 6
E: 4.5g pH 6
F: 4.3g pH 4
However, Drano seems to be drastically bringing the metal down, and the effect is instantaneous. Some of the aluminum surface corroded, and left a white substance in the Drano.
Blog 39 3/3/11
The Copper Weights & pH 3/3/11:
A: 18.9g pH 9
B: 18.3g pH 11
C: 19.0g pH 11
D: 19.1g pH 8
E: 17.8g pH 7.5
F: 17.5g pH 4.5
Some of the metals actually increased in weight, the corrosion cannot add on to the metals, so there must have been a problem with the weights or there was still some liquid trapped in the metal. I plan to blow dry it longer, so all the liquid evaporates. The ammonia leaves a blue trace on the copper, clorox made it blackish, and the color of the water is green, like the statute of liberty. Sulfuric acid does not look like it is affecting the metal a lot, but in fact, it has the second most corrosion. Copper has the least corrosion among the three.
A: 18.9g pH 9
B: 18.3g pH 11
C: 19.0g pH 11
D: 19.1g pH 8
E: 17.8g pH 7.5
F: 17.5g pH 4.5
Some of the metals actually increased in weight, the corrosion cannot add on to the metals, so there must have been a problem with the weights or there was still some liquid trapped in the metal. I plan to blow dry it longer, so all the liquid evaporates. The ammonia leaves a blue trace on the copper, clorox made it blackish, and the color of the water is green, like the statute of liberty. Sulfuric acid does not look like it is affecting the metal a lot, but in fact, it has the second most corrosion. Copper has the least corrosion among the three.
Blog 38 3/2/11
Aluminum Weights 3/2/11
A: 4.2g pH 8
B: 4.2g pH 11
C: 4.3g pH 12.5
D: 4.5g pH 6
E: 4.5g pH 6
F: 4.3g pH 4
The aluminum is not corroding alot in surface or weight. However, Drano is affecting it the most, in 2 days, it lost 0.1 gram!
A: 4.2g pH 8
B: 4.2g pH 11
C: 4.3g pH 12.5
D: 4.5g pH 6
E: 4.5g pH 6
F: 4.3g pH 4
The aluminum is not corroding alot in surface or weight. However, Drano is affecting it the most, in 2 days, it lost 0.1 gram!
Blog 37 3/2/11
The Steel Weights & pH 3/2/11:
A: 23.4g pH 9
B: 25.7g pH 10
C: 25.1g pH 10.3
D: 25.6g pH 8
E: 25.9g pH 6.5
F: 25.4g pH 5
I am observing lots of corrosion in the surface observation, but not too much weight change. Clorox has the most surface observation change, but sulfuric acid has them most weight corrosion.
A: 23.4g pH 9
B: 25.7g pH 10
C: 25.1g pH 10.3
D: 25.6g pH 8
E: 25.9g pH 6.5
F: 25.4g pH 5
I am observing lots of corrosion in the surface observation, but not too much weight change. Clorox has the most surface observation change, but sulfuric acid has them most weight corrosion.
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