Aluminum coating by fluidized bed chemical vapor deposition on austenitic stainless steels AISI 304 and AISI 316
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| Formato: | Artículo científico |
| Lenguaje: | en |
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Universidad Nacional de Colombia
2015
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| _version_ | 1876471211083431936 |
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| author | Jose Luddey Marulanda-Arevalo |
| author_facet | Jose Luddey Marulanda-Arevalo |
| contents | Aluminum coating by fluidized bed chemical vapor deposition on austenitic stainless steels AISI 304 and AISI 316 Jose Luddey Marulanda-Arevalo Saul Castañeda-Quintana Francisco Javier Perez-Trujillo Ingeniería Coating Aluminum Corrosion Oxidation Fluidized bed Aluminum coatings were deposited on stainless steels AISI 304 a nd AISI 316 at a temperature range from 560 to 600°C by CVDFBR , using a bed consisting of a 10% aluminum powder and 90% of bed inert (a lumina) which was fluidized with Ar and an activator mixture of hydrochloric acid with hydrogen (HCl/H 2 ). The coating without heat treat ment includes the follow speci es: Al 13 Fe 4 , Fe 2 Al 5 , FeAl 2 and Al 5 FeNi for both steels. In addition, the heat treatment causes the aluminum to diffuse into the substrate and the iron diffuse towards the surface of the coating, making the transformation of previous e xisting compounds to FeAl, Fe 2 Al 5 , FeAl 2, Al 0.99 Fe 0.99 Ni 0.02 , AlNi and Fe 2 AlCr. Thermodynamic simulation was conducted with the ThermoCalc s oftware to obtain information o f the possible composition and amount of deposited material, fo r selected conditions. The specimens coated and uncoated were exposed at 7 50 ºC in an atmosphere where the vapor was transported to the s amples using a N 2 flow of 40 ml/min plus 100% water vapor (H 2 O). The two uncoated substrates behaved differently, since the steel AISI 304 performed well and gained little weight (0.49 mg/cm 2 ), compared to the steel AISI 316 that lost too much weight (25 .4 mg/cm 2 ). Coated steels gained little weight during thousand hours of exposure (0.26 mg/cm 2 ) and support very well the corr osive attack compared to uncoat ed substrates. 2015 artículo científico 0012-7353 https://www.redalyc.org/articulo.oa?id=49635366003 en http://www.redalyc.org/revista.oa?id=496 Dyna application/pdf Universidad Nacional de Colombia Dyna (Colombia) Num.189 Vol.82 |
| format | Artículo científico |
| id | redalyc_49635366003 |
| institution | Redalyc |
| language | en |
| publishDate | 2015 |
| publisher | Universidad Nacional de Colombia |
| spellingShingle | Aluminum coating by fluidized bed chemical vapor deposition on austenitic stainless steels AISI 304 and AISI 316 Jose Luddey Marulanda-Arevalo Ingeniería Coating Aluminum Corrosion Oxidation Fluidized bed Aluminum coating by fluidized bed chemical vapor deposition on austenitic stainless steels AISI 304 and AISI 316 Jose Luddey Marulanda-Arevalo Saul Castañeda-Quintana Francisco Javier Perez-Trujillo Ingeniería Coating Aluminum Corrosion Oxidation Fluidized bed Aluminum coatings were deposited on stainless steels AISI 304 a nd AISI 316 at a temperature range from 560 to 600°C by CVDFBR , using a bed consisting of a 10% aluminum powder and 90% of bed inert (a lumina) which was fluidized with Ar and an activator mixture of hydrochloric acid with hydrogen (HCl/H 2 ). The coating without heat treat ment includes the follow speci es: Al 13 Fe 4 , Fe 2 Al 5 , FeAl 2 and Al 5 FeNi for both steels. In addition, the heat treatment causes the aluminum to diffuse into the substrate and the iron diffuse towards the surface of the coating, making the transformation of previous e xisting compounds to FeAl, Fe 2 Al 5 , FeAl 2, Al 0.99 Fe 0.99 Ni 0.02 , AlNi and Fe 2 AlCr. Thermodynamic simulation was conducted with the ThermoCalc s oftware to obtain information o f the possible composition and amount of deposited material, fo r selected conditions. The specimens coated and uncoated were exposed at 7 50 ºC in an atmosphere where the vapor was transported to the s amples using a N 2 flow of 40 ml/min plus 100% water vapor (H 2 O). The two uncoated substrates behaved differently, since the steel AISI 304 performed well and gained little weight (0.49 mg/cm 2 ), compared to the steel AISI 316 that lost too much weight (25 .4 mg/cm 2 ). Coated steels gained little weight during thousand hours of exposure (0.26 mg/cm 2 ) and support very well the corr osive attack compared to uncoat ed substrates. 2015 artículo científico 0012-7353 https://www.redalyc.org/articulo.oa?id=49635366003 en http://www.redalyc.org/revista.oa?id=496 Dyna application/pdf Universidad Nacional de Colombia Dyna (Colombia) Num.189 Vol.82 |
| title | Aluminum coating by fluidized bed chemical vapor deposition on austenitic stainless steels AISI 304 and AISI 316 |
| topic | Ingeniería Coating Aluminum Corrosion Oxidation Fluidized bed |
| url | https://www.redalyc.org/articulo.oa?id=49635366003 |