THE INHIBITIVE ACTION OF MAGNESIUM HYDROXIDE ON HOT ASH CORROSION OF STAINLESS STEEL IN A KEROSENE FIRED FURNACE
The inhibitive effect of magnesium oxide on the hot ash corrosion of steel structures of power generation station was studied using a kerosene fired furnace. Three alloys were selected including [SA 178A, 209 T1, 213 T11], prepared as rectangular pieces from water wall tubes and superheater tubes o...
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
University of Diyala
2010-12-01
|
| Series: | Diyala Journal of Engineering Sciences |
| Subjects: | |
| Online Access: | https://djes.info/index.php/djes/article/view/648 |
| _version_ | 1828437274349535232 |
|---|---|
| author | S. Al-Niaimi |
| author_facet | S. Al-Niaimi |
| author_sort | S. Al-Niaimi |
| collection | DOAJ |
| description |
The inhibitive effect of magnesium oxide on the hot ash corrosion of steel structures of power generation station was studied using a kerosene fired furnace. Three alloys were selected including [SA 178A, 209 T1, 213 T11], prepared as rectangular pieces from water wall tubes and superheater tubes of a local power station. The heating chamber of the furnace had shelves on which specimens are placed. Mg(OH)2 was mixed with synthetic slag (67%wt V2O5 and 33% wt Na2SO4) at molar ratios of 1:1, 1:2 and 1:3, respectively and applied on the surface of the cleaned specimens. The tests were carried out at fixed (4 h) and various time intervals (2-10 h) to study the normal oxidation at various temperatures (550-950˚C). The rate of oxidation is accelerated in the presence of vanadic slag and resulted in increased corrosion rate with increasing temperature (550-950 oC ). X-ray diffraction indicated the formation of NaV3O8, Na2O.V2O4.5V2O5, Na4V2O7, VOSO4, Na2SO4 and iron oxide (Fe2O3) . The weight loss of the three alloys specimens indicated a Clear reduction in the degree of corrosion with increasing Mg(OH)2 content. The scale changed into a powder form which can be easily removed from the surface of the specimens. The best results were obtained with the mole ratio 3:1, which gave inhibition efficiency of 85% at 550°C. The inhibition efficiency increases with temperature decrease. With the introduction of Mg(OH)2 with the ash magnesium vanadate Mg3V2O8 was a major constituent together with some MgO.
|
| first_indexed | 2024-12-10T19:42:13Z |
| format | Article |
| id | doaj.art-c92a4c6fd1bc4889bf1e3687199e7569 |
| institution | Directory Open Access Journal |
| issn | 1999-8716 2616-6909 |
| language | English |
| last_indexed | 2024-12-10T19:42:13Z |
| publishDate | 2010-12-01 |
| publisher | University of Diyala |
| record_format | Article |
| series | Diyala Journal of Engineering Sciences |
| spelling | doaj.art-c92a4c6fd1bc4889bf1e3687199e75692022-12-22T01:35:58ZengUniversity of DiyalaDiyala Journal of Engineering Sciences1999-87162616-69092010-12-01THE INHIBITIVE ACTION OF MAGNESIUM HYDROXIDE ON HOT ASH CORROSION OF STAINLESS STEEL IN A KEROSENE FIRED FURNACES. Al-Niaimi The inhibitive effect of magnesium oxide on the hot ash corrosion of steel structures of power generation station was studied using a kerosene fired furnace. Three alloys were selected including [SA 178A, 209 T1, 213 T11], prepared as rectangular pieces from water wall tubes and superheater tubes of a local power station. The heating chamber of the furnace had shelves on which specimens are placed. Mg(OH)2 was mixed with synthetic slag (67%wt V2O5 and 33% wt Na2SO4) at molar ratios of 1:1, 1:2 and 1:3, respectively and applied on the surface of the cleaned specimens. The tests were carried out at fixed (4 h) and various time intervals (2-10 h) to study the normal oxidation at various temperatures (550-950˚C). The rate of oxidation is accelerated in the presence of vanadic slag and resulted in increased corrosion rate with increasing temperature (550-950 oC ). X-ray diffraction indicated the formation of NaV3O8, Na2O.V2O4.5V2O5, Na4V2O7, VOSO4, Na2SO4 and iron oxide (Fe2O3) . The weight loss of the three alloys specimens indicated a Clear reduction in the degree of corrosion with increasing Mg(OH)2 content. The scale changed into a powder form which can be easily removed from the surface of the specimens. The best results were obtained with the mole ratio 3:1, which gave inhibition efficiency of 85% at 550°C. The inhibition efficiency increases with temperature decrease. With the introduction of Mg(OH)2 with the ash magnesium vanadate Mg3V2O8 was a major constituent together with some MgO. https://djes.info/index.php/djes/article/view/648Magnesium HydroxideHot Ash corrosionInhibition |
| spellingShingle | S. Al-Niaimi THE INHIBITIVE ACTION OF MAGNESIUM HYDROXIDE ON HOT ASH CORROSION OF STAINLESS STEEL IN A KEROSENE FIRED FURNACE Diyala Journal of Engineering Sciences Magnesium Hydroxide Hot Ash corrosion Inhibition |
| title | THE INHIBITIVE ACTION OF MAGNESIUM HYDROXIDE ON HOT ASH CORROSION OF STAINLESS STEEL IN A KEROSENE FIRED FURNACE |
| title_full | THE INHIBITIVE ACTION OF MAGNESIUM HYDROXIDE ON HOT ASH CORROSION OF STAINLESS STEEL IN A KEROSENE FIRED FURNACE |
| title_fullStr | THE INHIBITIVE ACTION OF MAGNESIUM HYDROXIDE ON HOT ASH CORROSION OF STAINLESS STEEL IN A KEROSENE FIRED FURNACE |
| title_full_unstemmed | THE INHIBITIVE ACTION OF MAGNESIUM HYDROXIDE ON HOT ASH CORROSION OF STAINLESS STEEL IN A KEROSENE FIRED FURNACE |
| title_short | THE INHIBITIVE ACTION OF MAGNESIUM HYDROXIDE ON HOT ASH CORROSION OF STAINLESS STEEL IN A KEROSENE FIRED FURNACE |
| title_sort | inhibitive action of magnesium hydroxide on hot ash corrosion of stainless steel in a kerosene fired furnace |
| topic | Magnesium Hydroxide Hot Ash corrosion Inhibition |
| url | https://djes.info/index.php/djes/article/view/648 |
| work_keys_str_mv | AT salniaimi theinhibitiveactionofmagnesiumhydroxideonhotashcorrosionofstainlesssteelinakerosenefiredfurnace AT salniaimi inhibitiveactionofmagnesiumhydroxideonhotashcorrosionofstainlesssteelinakerosenefiredfurnace |