Corrosion protection

Corrosion protection.


Question 1. What is rust?
Choose one answer:
a. Corrosion resistance index of metal
b. Insoluble corrosion products
c. Corrosion rate indicator
Question 2. What is the protective protection?
Choose one answer:
a. With protector protection, a more electronegative metal is attached to the protected structure - the protector - which, dissolving in the environment, protects the main structure from destruction
b. In case of protective protection, the negative pole of the direct current source is connected to the protected structure
c. With protector protection, a more electrically positive metal is attached to the protected structure - protector - which, dissolving in the environment, protects the main structure from destruction
Question 3. Give a definition of the term "corrosion"
Choose one answer:
a. Change metal properties
b. Spontaneous destruction of metal
c. The ability of metals to resist environmental influences
Question 4. Describe the main features of intergranular corrosion
Choose one answer:
a. The cause of intergranular corrosion is the subsurface destruction of grain boundaries, as a result of which there is a violation of bonds between individual grains of the metal.
b. The cause of intergranular corrosion is the accelerated dissolution of the metal of grain boundaries, as a result of which there is a violation of the bonds between individual grains of the metal, followed by their spalling
c. The cause of intergranular corrosion is the violation of bonds between individual grains of the metal due to heating of the metal
Question 5 By the mechanism of interaction with the environment, one can distinguish:
Choose one answer:
a. Electrochemical and chemical corrosion
b. Local and continuous corrosion
c. Corrosion, ulcerative, point, intercrystalline
Question 6. What process can be called electrochemical corrosion?
Choose one answer:
a. Metal oxidation and reduction of the oxidizing component proceed in one act and are not accompanied by the appearance of an electric current
b. Metal oxidation and reduction of the oxidizing component take place in more than one act and their rates depend on the electrode potential
c. Corrosion of metals in a gas atmosphere with a small amount of moisture
Question 7 Which additives increase the corrosion properties of steels?
Choose one answer:
a. Chrome, molybdenum, tungsten
b. Lead, silicon, manganese
c. Copper, lead, aluminum
Question 8 What is called alloying and for what purpose is it carried out?
Choose one answer:
a. Alloying - the introduction of elements into the composition of steel to impart certain mechanical properties or corrosion resistance
b. Alloying - the introduction of impurity elements into the composition of steel to impart certain mechanical properties or corrosion resistance
c. Alloying - hardening of steel to impart specific mechanical properties or corrosion resistance
Question 9. What are the main indicators of damage caused by corrosion
Choose one answer:
a. Expenses due to the loss of capacity of metal equipment, forced downtime of equipment due to accidents, costs of eliminating the consequences of accidents, loss of metal due to corrosion
b. Environmental disasters, irrecoverable losses of metal that have passed into corrosion products, the cost of manufacturing mechanical products
c. Intensive development of metal-intensive industries, tightening of metal operating conditions
Question 10 How does chromium affect the corrosion properties of alloys?
Choose one answer:
a. The introduction of chromium into iron improves passivability and increases the corrosion resistance of the passive state of Fe - Cr alloys.
b. The introduction of chromium into iron contributes to a decrease in passivability and an increase in the corrosion resistance of the passive state of Fe - Cr alloys
c. The introduction of chromium into iron improves passivability and reduces the corr