ATOM INDONESIA
Author's Responses
Article : #537
Name of All Authors : Toto Sudiro1*, Didik Aryanto1, Agus Sukarto Wismogroho1, Ciswandi1, Bambang Hermanto1, Hubby Izzuddin1, Rico Pratama1
Article Title : High Temperature Oxidation Behavior of Fe-Cr Steel in Air at 1000-1200 K E-mail : [email protected] / [email protected]
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# Referee’s Comments Author's Responses
9
The statement “the accelerated oxidation is likely to occur” is an ambiguity when present in the abstract. The fact it occurred already.
Please state it in the right way.
The statement in the revised manuscript was corrected to “the accelerated oxidation occurred”.
98- 99
The equation must be cited from a reference, please refer to the ref. cited despite it is already common.
A reference for kinetic oxidation evaluation was added in the revised manuscript Ref. 14.
The order of reference numbers was also rearranged.
121
Please fill it with the way how the micrographs (optical) were taken. After polishing to mirror finish, the preparation must be continued with etching steps. This should be shortly described in experimental method. What is etching agent used for metallography observation ?.
For metallographic observation, we didn’t perform the sample’s etching. After the cross-sectional cut, the sample was polished using the various grits of SiC papers for up to mirror finish (#4000). The aforementioned information was added in the experimental procedures.
138- 141
The experimental oxidation kinetic curve should be compared with that of an existing oxidation kinetic model. How good is your data matched with the oxidation kinetic
model ?
The parabolic plot of oxidation kinetic data of Fe-Cr steel after oxidation at 1000, 1100 and 1200 K for 72 ks was added in the revised manuscript (Fig. 2) in order to match with an existing kinetic model. The additional explanation was also added in the text.
- According to the oxidation kinetic data of the steel after oxidation at 1000 and 1100 K as shown in a small figure in Fig. 2, the oxidation kinetics of Fe-Cr steel on Fig. 1 considerably follow the parabolic plot behavior.
- Nevertheless, after 18 ks exposure, the mass gain of the sample is a sudden change and remarkably increased to 229.09 × 10-6 g/mm2
at 72 ks obeying linear law (see Fig. 2). This could be related to breakaway oxidation [6,9], resulting in severe oxidation at higher oxidation temperature.
188- 212
The sentences within these lines should not be a
new paragraph. Corrected as suggested.
189 How could you be sure it is a Fe-Cr Phase ?
The phase characterization was carried out by comparing the XRD measurement data with the ICDD database. The XRD analysis shows that the measurement data is
matching with ferritic Fe-Cr steel (DB card number of 00-054-0331). We changed the term of “Fe-Cr phase” to “ferritic phase” in the revised manuscript.
201- 206
475- 476
What kind of analysis used to confirm the phases defined in the paragraph? You didn’t refer to any references. Plots in Figure 3 seem still primary data, not analyzed data. Please clarify your statement.
There are 6 different photographs, but you considered them 3. Please clarify it.
The phase analysis of the sample before and after oxidation test was performed using Rigaku integrated X-ray powder diffraction software (PDXL) with PDF-4 database. The aforesaid clarification was added in the experimental.
Figure number (Figs. 5a-f) was corrected in the revised manuscript.
Figs. 5 a, b and c show the surface morphologies of the sample after high temperature oxidation test at 1000, 1100 and 1200 K, respectively for 72 ks. A higher magnification of the surface morphologies of oxidized Fe-Cr steel after oxidation at the aforementioned
temperatures is presented in Figs. 5 d, e and f.
The term of “Mn-Cr spinel” was changed to
“Cr-Mn spinel”
Please return to Atom Indonesia Editorial Office via e-mail: [email protected]
Author Signature(s) Date
3 November 2017
Toto Sudiro
