Skip to Main content Skip to Navigation
Journal articles

Optimization of Conversion Treatment on Austenitic Stainless Steel Using Experimental Designs

Abstract : Conversion coating is commonly used as treatment to improve the adherence of ceramics films. The conversion coating properties depend on the structure of alloy as well as on the treatment parameters. These conversion coatings must be characterized by strong interfacial adhesion, high roughness, and high real surface area, which were measured by an electrochemical method. The influence of all the elaboration factors (temperature, time, and bath composition: sulphuric acid, thiosulphate as accelerator, propargyl alcohol as inhibitor, and surface state) and also the interactions between these factors were evaluated, using statistical experimental design. The specific surface area and optical factor (α) correspond to the quantitative responses. The evaluation showed, by using a designed experimental procedure, that the most important factor was “surface state.” Sanded surface allows the formation of conversion coating with high real surface area. A further aim was to optimise two parameters: treatment time and temperature using Doehlert shell design and simplex method. The growth of the conversion coating is also influenced by treatment time and temperature. With such optimized conditions, the real surface area of conversion coating obtained was about 235 m2/m2.
Document type :
Journal articles
Complete list of metadata

Cited literature [21 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-02499551
Contributor : Open Archive Toulouse Archive Ouverte (oatao) <>
Submitted on : Thursday, March 5, 2020 - 1:04:10 PM
Last modification on : Saturday, March 7, 2020 - 1:36:53 AM
Long-term archiving on: : Saturday, June 6, 2020 - 3:13:14 PM

File

ElHajjaji_24440.pdf
Publisher files allowed on an open archive

Identifiers

Collections

Citation

Souad El Hajjaji, C Cros, Lucien Ariès. Optimization of Conversion Treatment on Austenitic Stainless Steel Using Experimental Designs. International Journal of Metals, 2013, 2013, pp.1-7. ⟨10.1155/2013/757049⟩. ⟨hal-02499551⟩

Share

Metrics

Record views

61

Files downloads

147