Study of steel heating pipes corrosion wear Текст научной статьи по специальности «Энергетика и рациональное природопользование»

Grand Altai Council of HEI Chancellors Network Edition

UDK 621.313

STUDY OF STEEL HEATING PIPES CORROSION WEAR

1 1 2 2 2 3

Balbar Sereglen , Erdenebat Ts ., Butuchanov V ., Tsydypov B ., Lygdenov B ' 1 - National University of Mongolia (Ulaanbaatar, Mongolia) 2 - East Siberia State University of Technology and Management (Ulan-Ude, Russia)

3 - Wuhan Textile University (Wuhan, China) E-mail: lygdenov59@mail.ru

Introduction

Within the research framework, the following listed goals and aims were defined as to determine the chemical composition of the alloying elements' and micro mixtures and their influence to physics-chemical and physical-mechanical properties for their operation period by preparing the samples from 30 locations of the Ulaanbaatar Heating Network's steel pipes for last 5-6 years as: to define their steel marks in general, for the central and branch lines of the hear transferring network; to define the hardness of the steel in order to study their chemical composition and metallographic conditions; to define the amount of the poisonous blends and elements; to define the impacts of the poisonous mixtures and elements by making the comparisons. The aim of this work is to study corrosion wear and chemical composition of samples from heating pipes.

Materials and methods

Optical - emission spectrometry PDA-700 and vacuum-emission spectrometry SRAS-2 studies to determine the chemical composition by instruments using MNS: JIS2246-46, MNS 1018-78 as based on technical requirement of heating network magisterial pipes.

Results and discussion

Regarding to the comparison results of the chemical components in the central lines, the amount of the sulfur and phosphorus pollutants compared with the above mentioned standards were in the maximum permitted amount of Q-235 and the phosphorus content was 2-3 times higher which decreases the resistance capabilities to the corrosion; and it would be reasonable to assume that the Q235 and Q345 line pipes used in the Thermal Power Plant of Ulaanbaatar city basically does not meet the requirements.

Сетевое издание Совета ректоров вузов Большого Алтая

Figure 1 - Additional and water network pH study result of Heating network 20102015

2015 оны сулжээний усны pH

9,6 9,4 9,2 9 9.16

S, S 8,6 8,4 8,2 8 7,8

7,6 ■

9.18

8.6

9.13

8.66

9.3 S

8.28

9.23

AMrajiaH^C J\L(C-2 ¿mC-3 9,qX flUC-3MX flUC-t ■ cyJiaisa ■ H3M3.TT yc

Figure 2 - Additional and water network pH study result of Heating network 2015

Figure 3 - The intensity indicator to determine internal corrosion of heating pipeline

between 2015-2016

Table 1 - Identified chemical compounds result of metal plate of indicator by Optical emission spectrometry RDA-7000 and Vacuum emission spectrometry CPAC

Year C% Si% Mn % P% S% Cu% Ni% Cr% Mo % Fe% Tool

2012 0,24 0,53 0,55 0,02 0,01 0,21 0,35 10,3 0,23 87.51 OES-

« Nauka i obrazovanie Bol'sogo Altaâ вование Большого Алтая» выпуск 1, 2017, страница 46 из 113

Grand Altai Council of HEI Chancellors Network Edition

5 4 4 RDA- 7000

2013 0,12 0,07 0,44 0,00 9 0,01 7 0,05 0,07 0,05 0,04 99.13

2014 0,16 0,2 0,23 0,02 0,02 0,08 0,11 0,06 5 - 98.8 VES-CPAC-2

Mean 0.17 0,26 0,40 0,01 8 0,01 7 0,11 0,17 3,48 0,13 5 95.14

Table 2 - Chemical composition analysis results of Indicatorwhich was located in

ge tting anc return f ow pipe

Chemical compound s Fe2O3 % CaO% MgO% SiO2 % A12O3 % SO3 %

getting flow pipe 85,6 3,5 1,5 5,1 0,72 2,8

Return PiPe 92,4 1,5 0,8 3 0,54 0,6

Conclusion

Regarding to the above mentioned research results we determinate that the corrosion of the line pipes are not based only from the water quality but also from the chemical component, hardness and the contaminants in these steel line pipes. Regarding to the comparison results of the chemical components in the central lines, the amount of the sulfur and phosphorus pollutants compared with the above mentioned standards were in the maximum permitted amount of Q-235 and the phosphorus content was 2-3 times higher which decreases the resistance capabilities to the corrosion; and it would be reasonable to assume that the Q235 and Q345 line pipes used in the Thermal Power Plant of Ulaanbaatar city basically does not meet the requirements.

References

1. Ole cristensen, Ernst cristensen. Hydro-X

2. Эксплуатация водо-подготовительных установок электростанций высокого давления. Н.А Мещерский. «Энергоатомиздат». Москва. 1984.

3. Шугамын дотоод зэврэлт тодорхойлох индикатор тавих заавар. УБДС ТЭХК. УБ. 1996.

4. ФОРМИРОВАНИЕ ФАЗОВОГО СОСТАВА ПРИ ДИФФУЗИОННОМ НАСЫЩЕНИИ В ПОРОШКОВОЙ СМЕСИ СОДЕРЖАЩЕЙ ФЕРРОСПЛАВЫ. Бутуханов В.А., Цыдыпов Б.С., Лыгденов Б.Д., Мэй Ш. Международный журнал экспериментального образования. 2016. № 8-0. С. 7576.

Сетевое издание Совета ректоров вузов Большого Алтая

5. Интрукция по эксплуатации тепловых сетей. Москва. 1972.

6. Дулааны хYчний тоноглолын зэврэлтэд хяналт тавих аргачилсан заавар. ЭХУГ., 1997.

7. ОПТИМИЗАЦИЯ СОСТАВА ДЛЯ ПОЛУЧЕНИЯ КАРБИДНЫХ ДИФФУЗИОННЫХ СЛОЕВ С МАКСИМАЛЬНОЙ ИЗНОСОСТОЙКОСТЬЮ. Бутуханов В.А., Цыдыпов Б.С., Мэй Ш., Лыгденов Б.Д. В сборнике: Перспективы развития технологий обработки и оборудования в машиностроении Сборник научных статей Международной научно-практической конференции. Ответственный редактор Горохов А.А.. 2016. С. 32-35.

8. http: //www. imetllc. com/phase-diagrams/

9. https://ru.wikipedia.org/wiki/Доменная печь#/т^аМ!е:Б^ furnace NT. PNG

10. FORMATION OF THE DIFFUSION LAYER PROCESSING CONCENTRATED ENERGY SOURCES SURFACE ACTIVE MIXTURES DEPOSITED ON THE STEEL SURFACE. Lygdenov B.D., Butukhanov V.A., Mei Sh., Chernykh E.V., Garmaeva I.A. В сборнике: Effect of external influences on the strength and plasticity of metals and alloys Book of the International seminar articles. Edition in Chief: Professor Sc. D., Starostenkov M.D.. 2015. С. 59.

11. https://ru.wikipedia.org/wiki/Бессемеровский процесс

12. ПЕРСПЕКТИВНЫЕ ДИФФУЗИОННЫЕ ПОКРЫТИЯ. Лыгденов Б.Д., Гурьев А.М., Мосоров В.И., Бутуханов В.А. Raleigh,North Carolina, USA, 2015.

13. http://steel-education.org/content/urok-08-proizvodstvo-chuguna- domennaya-pech

14. ПЕРСПЕКТИВНЫЕ МЕТОДЫ ПОЛУЧЕНИЯ УПРОЧНЯЮЩИХ ПОКРЫТИЙ. Гурьев М.А., Кошелева Е.А., Гурьев А.М., Лыгденов Б.Д., Галаа О.. Барнаул, 2016.

15. http://www.bssa.org.uk/topics.php?article=183

16. ФАЗОВЫЕ ПРЕВРАЩЕНИЯ В СТАЛЯХ С ГРАДИЕНТНЫМИ СТРУКТУРАМИ, ПОЛУЧЕННЫМИ ХИМИКО-ТЕРМИЧЕСКОЙ И ХИМИКО-ТЕРМОЦИКЛИЧЕСКОЙ ОБРАБОТКОЙ. Лыгденов Б.Д.. Диссертация на соискание ученой степени кандидата технических наук / Новокузнецк, 2004.

17. 0A (Japan, JIS ) - European (EU, EN) and wordwide Steel equivalent grades.

18. https://www.worldsteel.org/media-centre/press-releases/2016/October-2016-crude-steel-production0.html\

19. https://www3.epa.gov/ttnchie 1/ap42/ch04/final/c4s02 2a.pdf

« Nauka i obrazovanie Bol'sogo Altaa зование Большого Алтая» выпуск 1, 2017, страница 48 из 113