5. Match the terms with Russian equivalents.

Example: 15. deterioration – L. ухудшения характеристик

1.	weakening	A. подаваемый ток
2.	rust	B. коррозионный элемент
3.	discoloration	C. выходное напряжение
4.	impressed current	D. интенсивность
5.	direct current	E. (удельная) проводимость
6.	corrosion cell	F. ослабление
7.	output voltage	G. обезвоживание
8.	severity	H. постоянный ток
9.	water removal	I.	обесцвечивание
10. conductivity		J.	ржавчина
11. operating pressure		K. толщина стенки
12. yield strength		L. ухудшения характеристик
13. allowance		M. рабочее давление
14. wall thickness		N. предел текучести
15. deterioration		O. допуск

6. Fill in the gaps with the correct term.

Example: 7. relies upon

There are essentially two methods: 1. _________ ____________and 2. _______________. For 3. _________ __________ it is common to use an impressed current method. In this system, 4. __________ __________ is supplied to the pipeline. The current is adjusted to generate higher 5. ___________ _________. A 6. _________ __________ 7. relies upon the installation of 8._______ on or near the pipeline. The pipeline becomes the cathode of the system and the anodes 9.________ corrosion of the pipeline. When water is present on the transported fluid, corrosion of the internal pipe surfaces can also occur.

7. Scan through the following short definitions and do the after – task exercises.

Corrosion types

Pitting corrosion results in pits in the metal surface due to localized corrosion. Uniform or general corrosion proceeds at approximately the same rate over the whole surface being corroded and the extent can be measured as mass loss per unit area.

Crevice corrosion occurs in or immediately around a break in the material.

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Intergranular corrosion results in corrosion at or near the grain boundaries of the metal.

Erosion Corrosion involves conjoint erosion and corrosion that typically occurs in fast flowing liquids that have a high level of turbulence. Environment-induced cracking results from the joint action of mechanical stresses and corrosion.

8. Match the corrosion types in the right column with their Russian equivalents in the left one.

1.	crevice	A. сплошная
2.	intergranular	B. язвенная (точечная)
3.	general	C. наведенный крекинг
4.	erosion	D. защитная
5.	induced	E. местная
6.	pitting	F. сквозная
7.	spot	G. нитевидная
8.	penetration	H. равномерная
9.	isolated	I.	эрозионная
10. point		J.	межкристаллитная
11. sacrificial		K.	щелевая
12. continuous		L.	пятнами

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9. Look at the photos. Define the corrosion type and describe it.

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10. What is IT in each of these sentences?

1.IT occurs in fast flowing liquids that have a high level of turbulence

2.IT occurs over the whole surface

3.IT occurs in or around a break in the material

4.IT occurs as pits in the metal surface

5.IT occurs at or near the grain boundaries of the metal

6.IT occurs as cracks

7.IT occurs as the joint action of mechanical stresses and corrosion

11. Use the definitions to complete the following table. Comment on the items in the table.

FAILURE / FAULT	PROBABLE CAUSES	REMEDY
Pitting corrosion

12. Match the questions about corrosion on the left with the answers on the right.

1.	Do we have any problems?		A.	That’s what I’m doing.
2.	I see, now what can be done?		B.	Somewhere, about 1km. from
				here.
3.	That’s crazy. It’s time to work!		C.	H’m, well I think, maybe, like
				the Moon surface.
4.	What section is damaged?		D.	How can I do it?
5.	Can you identify the area of		E.	Maybe, some corrosion.
	corrosion on this section?
6.	If you are so eager, tell me what		F.	Had I time, even now.
	does it look like?
7.	How long do you think it’ll take		G.	Let’s paint it.
	to test and measure it?
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