Journals →  Tsvetnye Metally →  2016 →  #4 →  Back

METAL PROCESSING
ArticleName Method of sulphide corrosion assessment and investigation оf structure influence on granulated nickel alloys taking into account exploitation
DOI 10.17580/tsm.2016.04.09
ArticleAuthor Sinyavskiy V. S., Ber I. B., Vostrikov A. V., Grits N. M.
ArticleAuthorData

All-Russia Institute of Light Alloys, Moscow, Russia:

V. S. Sinyavskiy, Chief Researcher, e-mail: jkmufcjhjrbyf@yandex.ru
I. B. Ber, Chief Researcher
A. V. Vostrikov, Leading Researcher
N. M. Grits, Chief Researcher

Abstract

All-Russia Institute of Light Alloys developed the method for definition of sulphide corrosion resistance of the alloys, passed through the granuleprocessing stages. According to this, the method is more correct than the passport method, which doesn’t take into account the products manufacturing technology. The passport method results vary from 3 to 9 points (from the corrosion absence to the low-stable state). This is connected with the irregular compound of sulphates and chlorides, because sulphide and chloride corrosions are developed by various mechanisms. Corrosion resistance is increased to 3 points (almost the lack of corrosion), together with increasing holding time from 30 to 500 hours, as well as with exploitation. According to this, testing results according to the method of the Institute of Light Alloys are correlated to the results of the assessment of the state of disks after exploitation. Negative influence of sulphide corrosion on heat resistance is caused by the increasing the number of cracks on the initial stage, which are referred to the corrosion stress cracking. Increasing the number of heatings during exploitation increases the resistance to this type of cracking. According to this, heat resistance after exploitation under the influence of sulphide medium is higher, than initial heat resistance. The measurement procedure MI 26-NKK-14 (МИ 26-НКК-14) was patented on the basis of investigation of the results of measurements and optional control on sulphide corrosion disks, manufactured by the Institute of Light Alloys.

keywords Sulphide corrosion, testing method, corrosion cracking, laboratory testings, exploitation, heat resistance, nickel granulated alloys, atmosphere corrosion, chloride corrosion
References

1. Sinyavskiy V. S., Garibov G. S., Ber L. B., Mukhina T. A., Vostrikov A. V., Grits N. M. Analiz korrozionnogo sostoyaniya diskov gazoturbinnykh dvigateley iz granuliruemykh nikelevykh splavov posle dlitelnoy ekspluatatsii (Analysis of the corrosion state of disks of granulated nickel alloy gas-turbine engines after long-term exploitation). Tekhnologiya legkikh splavov = Technology of Light Alloys. 2015. No. 2. pp. 75–81.
2. Supersplavy: zharoprochnye materialy dlya aerokosmicheskikh i promyshlennykh energoustanovok (Superalloys: Heat-resistant materials for aerospace and industrial energy installations). Translated from English. Under the editorship of R. E. Shalin. Book 1. Moscow : Metallurgiya, 1995. 384 p.
3. Sinyavskiy V. S., Aleksandrova T. V., Vostrikov A. V., Grits N. M., Ber L. B. Vliyanie sulfidnoy korrozii na zharoprochnye nikelevye splavy, poluchennye metodom metallurgii granul (Influence of sulphide corrosion on heat-resistant nickel alloys, obtained by granule metallurgy). Tekhnologiya legkikh splavov = Technology of Light Alloys. 2013. No. 4. pp. 209–215.
4. Davydov M. N. Metod uskorennykh ispytaniy na vysokotemperaturnuyu gazovuyu korroziyu soplovykh lopatok turbin gazoturbinnykh dvigateley : avtoreferat … kandidata tekhnicheskikh nauk (Method of accelerated testings with definition of high-temperature gas corrosion of nozzle vanes of turboshaft turbines: Thesis of Inauguration of Dissertation … of Candidate of Engineering Sciences). Ufa, 2006.
5. Nikitin V. I. Korroziya i zashchita lopatok gazovykh turbin (Corrosion and protection of gas turbine vanes). Leningrad : Mashinostroenie, 1987. 272 p.
6. Schutze M. Innovative concepts for high temperature corrosion. European Corrosion Congress. 2013. No. 47.
7. Valle L. S. M. et al. Effect of present phases on the corrosion of Inconel 718 in offshore environment. European Corrosion Congress. 2013. No. 1127.
8. High Temperature Corrosion Resistant Alloys. USA : Haynes International, 2008. 205 p.
9. Rolland R., Buscaril H., Issartel C. Influence of Water Vapor on Isotermal Cyclic Oxidation of a Nickel-Based SY625 Alloy at 1000 oС. European Corrosion Congress. 2013. p. 62.
10. Issartel C., Buscaril H., Rolland R., Riffard F., Rabaste F. Influence of Sodium and Calcium on the 330 cb (Fe–35 Ni–18 Cr–1 Nb–2,15 Si) Alloy Oxidation at 900 oС. European Corrosion Congress. 2013. p. 84.
11. Boukis N., Hauer E., Habicht W. Corrosion Behaviour of Ni-Base Alloy in Super-critical Water Containing Alkali Chlorides. European Corrosion Congress. 2013. p. 40.
12. Baker B. A., Maira D., Gollinne R. D. Corrosion Resistance of Age-Hardenable Nickel-Base Alloy 740 H for Advanced Ultra Supercritical Service in Fossil fuel Power Plant. European Corrosion Congress. 2013. p. 37.

Language of full-text russian
Full content Buy
Back