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Questions and Answers
What is an important factor to consider when selecting a corrosion inhibitor?
What is an important factor to consider when selecting a corrosion inhibitor?
- The brand name of the inhibitor
- The ease of application of the inhibitor
- The compatibility of the inhibitor with the metal, corrosive environment, and desired application conditions (correct)
- The color of the inhibitor
What is a mechanism by which corrosion inhibitors protect metal surfaces?
What is a mechanism by which corrosion inhibitors protect metal surfaces?
- Adsorption on the metal surface, creating a barrier to corrosive species (correct)
- Cathodic poisoning, reducing the activity of cathodic sites on the metal surface
- Film formation by reaction with the metal, increasing its reactivity
- Anodic passivation, forming a protective oxide layer on the metal
Which thermodynamic parameter indicates a spontaneous corrosion reaction?
Which thermodynamic parameter indicates a spontaneous corrosion reaction?
- ΔG° > 0
- ΔG° < 0 (correct)
- ΔH° < 0
- ΔS° > 0
What does a negative value of ΔG° for a corrosion reaction imply?
What does a negative value of ΔG° for a corrosion reaction imply?
What is a desirable characteristic for an ideal corrosion inhibitor?
What is a desirable characteristic for an ideal corrosion inhibitor?
In a galvanic corrosion cell, which metal is the anode?
In a galvanic corrosion cell, which metal is the anode?
What is a potential disadvantage of using corrosion inhibitors?
What is a potential disadvantage of using corrosion inhibitors?
What is the most important factor to consider when selecting a corrosion inhibitor for a specific application?
What is the most important factor to consider when selecting a corrosion inhibitor for a specific application?
What is the Pourbaix diagram used for?
What is the Pourbaix diagram used for?
In a Pourbaix diagram, what does the immunity region correspond to?
In a Pourbaix diagram, what does the immunity region correspond to?
What is a mechanism by which corrosion inhibitors can form a protective layer on the metal?
What is a mechanism by which corrosion inhibitors can form a protective layer on the metal?
What is a characteristic that can influence the effectiveness of a corrosion inhibitor?
What is a characteristic that can influence the effectiveness of a corrosion inhibitor?
What is the correct statement about corrosion potential and corrosion current?
What is the correct statement about corrosion potential and corrosion current?
What does an Evans diagram depict in the context of corrosion?
What does an Evans diagram depict in the context of corrosion?
What type of Evans diagram represents a situation where the cathodic reaction rate is controlled by the rate of mass transport of the reacting species to the electrode surface?
What type of Evans diagram represents a situation where the cathodic reaction rate is controlled by the rate of mass transport of the reacting species to the electrode surface?
How many methods of determining corrosion rate are there?
How many methods of determining corrosion rate are there?
What is the basic principle of the weight loss method for determining corrosion rate?
What is the basic principle of the weight loss method for determining corrosion rate?
What does the variable 'A' represent in the corrosion rate formula K.W/A.T.D?
What does the variable 'A' represent in the corrosion rate formula K.W/A.T.D?
What is the unit of measurement used to express corrosion rate?
What is the unit of measurement used to express corrosion rate?
How is corrosion rate evaluated for metallic materials in non-oxidizing media?
How is corrosion rate evaluated for metallic materials in non-oxidizing media?
What is the primary purpose of comparing results with and without the addition of an inhibitor in the corrosion rate experiment?
What is the primary purpose of comparing results with and without the addition of an inhibitor in the corrosion rate experiment?
What is the primary purpose of the Thermometric Method (Mylius method)?
What is the primary purpose of the Thermometric Method (Mylius method)?
What is the initial step in the Mylius method?
What is the initial step in the Mylius method?
What does the reaction number (R.N.) represent in the Mylius method?
What does the reaction number (R.N.) represent in the Mylius method?
In a Pourbaix diagram, which zone is characterized by a high rate of oxidation reactions?
In a Pourbaix diagram, which zone is characterized by a high rate of oxidation reactions?
What is represented on the vertical axis of a Pourbaix diagram?
What is represented on the vertical axis of a Pourbaix diagram?
What do current-potential curves primarily display in electrochemical studies?
What do current-potential curves primarily display in electrochemical studies?
Which of the following statements about corrosion current and corrosion potential is true?
Which of the following statements about corrosion current and corrosion potential is true?
In which zone of a Pourbaix diagram is a metal immune to corrosion?
In which zone of a Pourbaix diagram is a metal immune to corrosion?
What can be inferred about a metal's corrosion susceptibility from its current-potential curve?
What can be inferred about a metal's corrosion susceptibility from its current-potential curve?
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