Tests were conducted according to the agreement of № of 4/[pr]-07/13 from 16.04.2007 g. between the privately held company “OF [NPO] “Of [korrzashchita]” and [OOO] “the institute of VNIIST”.

Tested material:

Priming enamel [UNIPOL] V -[Se] beyond the siliconeepoxy basis.
Color of coating - salad.

Purpose of the tests:

Determination of the possibility of applying the coating [UNIPOL] V -[Se] of the firm of privately held company “[NPO] “Of [korrzashchita]” for the anticorrosive protection of the external surface of the reservoirs, intended for storing of oil and petroleum products.

Models for the tests:

• steel plates with the size of 150x70x4 mm with the bilateral protective coating with a thickness of 100-130 m, average thickness is 115 m;
• steel plates with the size of 150[kh]60[kh]1,0 mm with the one-sided coating with a thickness of 110-140 m, average thickness is 125 m;
• steel plates with the size of 100x100x4,0 mm with the bilateral coating with a thickness of 110 and 120 m;
• the free films of the complex coating with a thickness of 130-170 m; average thickness is 150 m.

Preparation of models and the application of the coating:

They were achieved by a customer.

Conditions of conducting the tests:

1. Determination of the initial physicomechanical and electrochemical characteristics of coating.
2. Determination of the resistance of coating to the complex action of climatic factors (30 cycles) ALL-UNION STATE STAN. 9.401, method 8.
3. Determination of the resistance of coating to heat-aging (60o[S]- 1000 h.) ([ISO] 3248).
4. Determination of the resistance of coating to the action of highly aggressive crude oil with 40o[S] during 120 h. ([ISO] 2812-1).
5. Determination of the resistance of coating due to the conditions for the continuous condensation of moisture at a temperature of 40o[S] during 480 h. ([ISO] 6270).
6. Determination of the resistance of coating to the action of salt fog with (35 ± 2) ^o[S] during 720 h. (ALL-UNION STATE STAN. 9.401).
7. Resistance to the action of variable temperatures (+40o[S] ^* - 60o[S]; 10 cycles; ALL-UNION STATE STAN. 27037).

Table 1 presents the results of the tests of some physicomechanical properties of protective coating.

Table 1 results of the tests of the external protective coating [UNIPOL] V -[Se]

Characteristic	Index	Norma
Dielectric continuity of coating, V/m (ASTM G6)	9	Not less than 4
Abrasion on the instrument Of taber Of abraser (rollers CS 17, load 1000 g, the number of cycles 1000), of mH, (ASTM D 4060)	152	Not more than 160
Resistance of coating to the action of salt fog with (35 ± 2) o[S] during 480 h., the propagation of corrosion from cut, mm (ALL-UNION STATE STAN. 9.401, method b)	1,5	Not more than 2,0

The represented before Table 1 results correspond to the technical requirements of joint stock company “[AK] “trans-oil”.

The determination of the resistance of coating to the complex action of climatic factors carried out according to GOST 9.401, method 8. regime of tests, the sequence of displacement and the time of holding of models before the apparatuses before one cycle were given before tables 2. carried out 30 cycles.

Table it is 2nd the regimes of tests and the sequence of displacing the models before the apparatuses

Equipment	Regimes of the testing		Duration of endurance of models before one cycle, h.
	Temperature, o[S]	Relative humidity, %
Camera of the moisture	55±2	97±3	7
Camera of moisture with the turned-off heating	It is not normalized	97±3	1
Camera of sulfur dioxide (concentration SO2 (5±1) mg/m)	40±2	97±3	2
Camera of cold	Minus (60±3)	It is not normalized	3
Apparatus of artificial weather the regime: 4 min. irrigation 16 min. without the irrigation	60±3	It is not normalized	10
Endurance in air	15-30	Not more than 80	1
Altogether:			24

Table 3 leads the indices of the properties of protective coating, obtained before and after of endurance of it under varied conditions, and also standard joint stock company “[AK] “trans-oil” down the indices of the properties of outer covering.

Table 3- the results of the tests of the shielding outer covering [UNIPOL] V -[Se] under varied conditions

Indices	Throughout the tests	Crude oil, 40o[S]-120[ch]	Thermo-test, 60o[S]-1000[ch].	Continuous condensation of moisture, 40o[S] of -480[ch].	Thermocycling, (+40o[S] of -60o[S]) 10 cycles	Complex action of climatic factors, 30 cycles (method 8, ALL-UNION STATE STAN. 9.401)	Norma
The exterior view of coating (ALL-UNION STATE STAN. 9.407)	Flat, smooth, continuous semigloss coating of the salad color	It is slightly yellowed	Without the changes	Without the changes	Without the changes	Insignificant darkening and the loss of the luster	Uniform surface without the passages and the visible defects. After tests a change in the color and the loss of the luster are allowed
Adhesion by X-shaped cut, mark (ASTM D 3359)	5[A]	5[A]	5[A]	5[A]	5[A]	5[A]	Initial - not lower than 4[A]. After tests - not below [za]
Adhesion by the method of detachment” MPa, and the nature of detachment * (ISO 4624)	3,66 100% of [kogez]. the detachment	3,04 100% of [kogez]. the detachment	3,2 100% of [kogez]. the detachment	4,52 100% of [kogez]. the detachment	4,2 100% of [kogez]. the detachment	4,29 100% of [kogez]. the detachment	3,5 - 5,0 MPa - is not more than 50% adhesive detachment, reduction in the index down 30%;
Tensile strength of film, [N]/[mm]2, (ALL-UNION STATE STAN. 18299)	27,4	26,7	34,8	32,7	-	-	It is not normalized
Elongation at rupture, e, %, (ALL-UNION STATE STAN. 18299)	3,58	3,44	3,26	3,21	-	-	Initial - is not less than 3,5 MPa. After tests reduction in the index is not more than down 10%
Module of elasticity, E, [N]/[mm]2 (ALL-UNION STATE STAN. 18299)	1883,0	1354,0	1426,0	1093,0	-	-	It is not normalized
Elasticity, mm, (ALL-UNION STATE STAN. 29309)	2,0	-	0,9	-	2,2	-	Throughout the tests -1,5 mm; after tests - 0,6 mm
Correlation coefficient of capacities with frequencies 5 and 50 kHz, Kf (TOCT 9.409)	0,88	0,89	-	0,91	0,93	0,89	Not less than 0,8
Dielectric power factor, tg 5 (ALL-UNION STATE STAN. 9.409)	0,19	0,14	-	0,08	0,06	0,19	Not more than 0.2
Surface condition of metal under the coating	Absence of the corrosion

The results of tests, presented before Table 3, attest to the fact that the shielding and electrochemical properties of coating satisfy the technical requirements of joint stock company “[AK] “trans-oil”, presented down the outer coverings for the anticorrosive protection of storage tanks of oil and petroleum products.

CONCLUSION

Protective coating priming enamel [UNIPOL] V -[Se] the production of the firm of privately held company “[NPO] “Of [korrzashchita]” with the average thickness of 120 m corresponds to the technical requirements rd of 05.00-45.21.30-[KTN]-005-1-05 “the rules of the anticorrosive protection of reservoirs”, by affirmed joint stock company “[AK] “trans-oil”, and is recommended for the anticorrosive protection of the external surface of storage tanks of oil and petroleum products due to the conditions of the industrial atmosphere of the zones of cold and moderate climates far from the rivers and seas (category of atmospheric corrosiveness [s] 3). Tentative period of the service of coating for the category with 3 in accordance with [ISO] of 12944 15-20 years.

Manager besides the laboratory of anticorrosive coatings of reservoirs and internal surface of pipes and conduits [S]. [M]. [Ushanov]
Senior scientific worker [I]. [V]. [Gazuko]