Name: Habiba Amr Eloui Salem.
Class: Myp3C.
Title: Factors affects corrosion of metals.
Task: B & C.
Subject: Science.
Date: 18/10/2022.
What is mean by corrosion?
Corrosion is the most process happens daily in our life. Corrosion is a naturally
process of converting a naturally refined metal into a more stable form such as
metal oxide, metal hydroxide, metal sulfide state and leads to poor substance or
degraded matter. The reasons behind this is the oxygen that in the air mix with
the metals and the corrosion happens or mix between the carbon dioxide that is
in the atmosphere with the metal corrosion happens.
(What is corrostion).
What are the types of corrosion:
There are many types of corrosion in our life and all of them happen daily. The
types of corrosion are Atmospheric corrosion, Erosion corrosion, Pitting corrosion,
Fretting corrosion, Stress corrosion, De-Alloying corrosion or Selective leaching
and Inter-Granular corrosion. It is the most famous types of corrosion in our life
and happens daily.
(What are the types of corrosion).
Real Problem:
My friend owns a bicycle that she got from her father for her last birthday. Still,
last winter the bike started corrosion because of the weather, rain and dust that
the bike was exposed to throughout the winter; and also because she travelled
aboard all winter without taking the bike with her and left it at the entrance of
her house, and this helped more to corrosion the bike faster than before. She
wants me now to know how and why the bike corrosion to fix it and to save it
from corrosion the next time.
Research Question:
What are the factors that effect on corrosion of metals?
Hypothesis:
In my opinion, I think that the water (rain) effect on the corrosion of the metal
(the bike) more than the winds that happens in the winter every year, and I think
this because the rain had percentage of salts and oxygen; and this helps more to
get the metal corrosion faster.
The factors that effect on corrosion of metals:
1- Temperature:
Heat is also a part in how fast metal rusts. Generally speaking, higher
temperatures are associated with higher rates of corrosion. Therefore, the
temperature caused by the weather may affect how fast metal rusts. You can
generally expect less rust in the winter and more in the summer; however, this
can change based on other factors. For instance, a lower temperature but
increased humidity could still lead to increased rust.
2- Rain:
Metal corrodes when it goes through a chemical reaction that involves oxygen
and salt in water (rain); if the metal remains dry at many times it are much less
likely begin to corrode than if it is constantly exposed to rain or to high humidity
condensing on the metal. It will be corrode this time, and rain can also hasten the
corrosion process through constant wetness.
3- Bacteria:
Bacterial metabolites change the environmental conditions (such as salinity,
acidity, and oxygen concentration) around metal surfaces, which lead to the
formation of corrosion on the materials.
(factors effect corrosion of metals) , (factors effect corrosion of metals) , (factors
effect corrosion of metals).
Hypothesis:
In my opinion; I think that there is a direct relation between corrosion of metals
and water or rain. Because the metal when corroded goes through a chemical
reaction that includes oxygen and salt in the water (rain); if the metal has been
kept dry several times, it is less likely to begin to corrode much than if it was
constantly exposed to rain to high humidity condensing on the metal. In this time
the metal will corrode.
Variables:
Dependent Variable: The dependent variable in this experiment will be the
corrosion rate, and I will scale it by time. In another meaning I will scale how
many hours or days will the metal corrode.
Independent Variable: The independent variable in this experiment will be the
amount of water. In another meaning I will change the amount of water to see
which amount will be more effect on the corrosion of metal.
Controlled Variable: I will control by using the same amount of wire in each
experiment (5 gm), and I will put the same amount of salt in each cup of water.
Materials:
1- 4 cups of water.
2- 20 gm of wire.
3- Stop watch.
4- 4 dishes.
5- Spoon.
6- 10 gm salt.
Safety Methods:
1- My Parents to avoid anything will harm us.
2- Lab glasses because our eyes can be exposed to water and salt.
3- Gloves because the nails can harm our hands.
4- Coat to safe our clothes and don’t be dirty.
Steps:
1- Go to get 20 gm of wire.
2- Get 4 cups of water with the same size.
3- Get the salt.
4- Bring the materials.
5- Put the salt in the water and dissolves it.
6- Put the wire in the salty water.
7- Measure the corrosion time of the wire.
Data Collection:
Trails
Time 1
Time 2
Time 3
Time 4
1
2
3
4
Trails
Time 1 =
1 hour
Time 2 = 1 hour
Time 3 = 1
hour
Time 4 = 1 hour
Amount of salt
1
7:85
7:40
7:27
7:30
10 gm of salt
2
5:55
5:45
5:31
5:21
10 gm of salt
3
3:75
3:69
3:49
3:15
10 gm of salt
4
1:95
1:90
1:50
1:25
10 gm of salt
9
8
7
6
Column1
5
Column2
4
Column3
3
2
1
0
Trial 1
Trial 2
Trial 3
Trial 4
Hypothesis:
My hypothesis is right. Because the metal when corroded goes through a
chemical reaction that includes oxygen and salt in the water (rain); if the metal
has been kept dry several times, it is less likely to begin to corrode much than if it
was constantly exposed to rain to high humidity condensing on the metal. In this
time the metal will corrode.
Evaluation of methods:
I think if I had done the experiment in the science lab and not at home, it would
have been more accurate; because the quantities I used were not very accurate;
for example putting water inside the beaker and measuring the rate of corrosion
of the wire that I put it in the salty water in an electric scale is better than this.
Resources:
Bibliography:
factors effect corrosion of metals. (n.d.). Retrieved from youtube.com:
https://www.youtube.com/watch?v=voKRXIZjzvQ&t=183s
factors effect corrosion of metals. (n.d.). Retrieved from tandfonline.com:
https://www.tandfonline.com/doi/full/10.1179/147842209X125594281678
41
factors effect corrosion of metals. (n.d.). Retrieved from youtube.com:
https://www.youtube.com/watch?v=TKMgUCq3npg&t=1s
What are the types of corrosion. (n.d.). Retrieved from youtube:
https://www.youtube.com/watch?v=3gMVMGhrOyA&t=64s
What is corrostion. (n.d.). Retrieved from youtube:
https://www.youtube.com/watch?v=TKMgUCq3npg