Homework Answers
Stainless steel has Chromium content of 16-26% along with iron and carbon alloy in major proportion while carbon steel has not enough chromium content as a result when carbon steel exposed to the environment the oxygen in air interacts with the material and form iron oxide (called rust). On the other hand when oxygen interacts with the stainless steel it forms chromium oxide thus preventing it from corrosion.
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(2) Explain why stainless steel is more corrosion resistant in many environments than plain carbon steel.
Why did accelerated corrosion took place on carbon steel despite the presence of an inner coating? How could it be avoi...
Why did accelerated corrosion took place on carbon steel despite
the presence of an inner coating? How could it be avoided by
changing the design or the material choice?
"Area Effects in Galvanic Corrosion" A large ratio of cathode-to-anode surface area is to be avoided because the galvanic attack is concentrated in small areas, and penetration of the anode thickness is hastened. Large anode surface spreads the attack over a greater area and reduces the rate of penetration. A classic...
Question 3 (20 marks) Two 304 stainless steel plates are welded together at their ends as...
Question 3 (20 marks) Two 304 stainless steel plates are welded together at their ends as shown. During operation, the plates are exposed to a wet chloride environment and subjected to tensile forces as shown in Figure Q3. After a period of time, the plates are found to have failed at the weld joint as a result of stress corrosion cracking. weld 304 stainless steel plate 304 stainless steel plate applied force applied force Figure Q3 (a) Explain what is...
please explain with the figure 2 A plain plain carbon steel of unknown composition is cooled...
please explain with the figure
2 A plain plain carbon steel of unknown composition is cooled in the furnace from w oning temperature. At room temperature, the percentage of primary (proeutectoid) ferrite() monin this steel is found to be 27%. Use Figure 1 and answer the following questions. What is the concentration of carbon present in this steel? b) Which other phase or phases will you find in the structure of this steel? c) Calculate the amount of the phase...
1. What is difference between plain carbon steel and cast iron in terms of composition and toughn...
1. What is difference between plain carbon steel and cast iron in terms of composition and toughness? Illustrate the difference with the aid of an Fe-FesC eqilibrium phase diagram and stress strain diagram. 2. Perform the literature search and determine the composition and at least one application of the following ferrous alloys a. AISI4140 steel b. AISI 1045 steel с. А36 d. ASTM A312 steel e. ASTM 516 Grades 70 steel f D2 steel g. O1 steel h. AISI304 stainless...
Describe a simple test you will perform to ascertain the corrosion rate of materials? Derive an...
Describe a simple test you will perform to ascertain the corrosion rate of materials? Derive an expression for the corrosion rate of materials. What is the process of aluminium anodising? Plain carbon steel immersed in sea water has a uniform corrosion rate expressed as 0.127 mm per year. The density of iron is 7.87Mg/m2. The atomic weight of Fe is 55.8 g/mol a. Calculate the weight loss per year per unit area b. Calculate the corresponding minimum corrosion current per...
Please help! Thank you! If one has a 1060 plain carbon steel, the carbon content is...
Please help! Thank you!
If one has a 1060 plain carbon steel, the carbon content is 1.06 wt% 0.60 wt.% 60 wt.% 10.6 wt.% In general, stainless steels have high content of which of these metals? Mn Mo Cr Ba A cast iron steel has carbon content compared to a steel Less More Equal Which of these elements is not considered a noble metal As Au Ti Pt As a Boeing engineer, you are designing a new Aluminum body frame...
Why do alloy steels have greater hardenability than plain carbon steels?
Why do alloy steels have greater hardenability than plain carbon steels?
resistor? 4. Explain why the differential signaling used in the CAN bus is more resistant to...
resistor? 4. Explain why the differential signaling used in the CAN bus is more resistant to problems with the electrical noise in a car than the single-ended signaling used by the other buses.
Why must the solid reactants in modern batteries be supported on a stainless-steel grid? (2 points)
Why must the solid reactants in modern batteries be supported on a stainless-steel grid? (2 points)
30o 3 aluminum is betas than 2024 alumincem in corrosion resistance. Problem 2: An aircraft wing...
30o 3 aluminum is betas than 2024 alumincem in corrosion resistance. Problem 2: An aircraft wing composed of carbon fiber-reinforced epoxy is connected to an aluminum forging on the fuselage. Will the anode for a corrosion cell be the carbon fiber, the aluminum, or the epoxy? Which is most likely the cathode? Explain.
Why did accelerated corrosion took place on carbon steel despite
the presence of an inner coating? How could it be avoided by
changing the design or the material choice?
"Area Effects in Galvanic Corrosion" A large ratio of cathode-to-anode surface area is to be avoided because the galvanic attack is concentrated in small areas, and penetration of the anode thickness is hastened. Large anode surface spreads the attack over a greater area and reduces the rate of penetration. A classic...
Question 3 (20 marks) Two 304 stainless steel plates are welded together at their ends as shown. During operation, the plates are exposed to a wet chloride environment and subjected to tensile forces as shown in Figure Q3. After a period of time, the plates are found to have failed at the weld joint as a result of stress corrosion cracking. weld 304 stainless steel plate 304 stainless steel plate applied force applied force Figure Q3 (a) Explain what is...
please explain with the figure
2 A plain plain carbon steel of unknown composition is cooled in the furnace from w oning temperature. At room temperature, the percentage of primary (proeutectoid) ferrite() monin this steel is found to be 27%. Use Figure 1 and answer the following questions. What is the concentration of carbon present in this steel? b) Which other phase or phases will you find in the structure of this steel? c) Calculate the amount of the phase...
1. What is difference between plain carbon steel and cast iron in terms of composition and toughness? Illustrate the difference with the aid of an Fe-FesC eqilibrium phase diagram and stress strain diagram. 2. Perform the literature search and determine the composition and at least one application of the following ferrous alloys a. AISI4140 steel b. AISI 1045 steel с. А36 d. ASTM A312 steel e. ASTM 516 Grades 70 steel f D2 steel g. O1 steel h. AISI304 stainless...
Describe a simple test you will perform to ascertain the corrosion rate of materials? Derive an expression for the corrosion rate of materials. What is the process of aluminium anodising? Plain carbon steel immersed in sea water has a uniform corrosion rate expressed as 0.127 mm per year. The density of iron is 7.87Mg/m2. The atomic weight of Fe is 55.8 g/mol a. Calculate the weight loss per year per unit area b. Calculate the corresponding minimum corrosion current per...
Please help! Thank you!
If one has a 1060 plain carbon steel, the carbon content is 1.06 wt% 0.60 wt.% 60 wt.% 10.6 wt.% In general, stainless steels have high content of which of these metals? Mn Mo Cr Ba A cast iron steel has carbon content compared to a steel Less More Equal Which of these elements is not considered a noble metal As Au Ti Pt As a Boeing engineer, you are designing a new Aluminum body frame...
resistor? 4. Explain why the differential signaling used in the CAN bus is more resistant to problems with the electrical noise in a car than the single-ended signaling used by the other buses.
30o 3 aluminum is betas than 2024 alumincem in corrosion resistance. Problem 2: An aircraft wing composed of carbon fiber-reinforced epoxy is connected to an aluminum forging on the fuselage. Will the anode for a corrosion cell be the carbon fiber, the aluminum, or the epoxy? Which is most likely the cathode? Explain.
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