ridm@nrct.go.th   ระบบคลังข้อมูลงานวิจัยไทย   รายการโปรดที่คุณเลือกไว้

Corrosion resistance of white cast irons in caustic solutions

หน่วยงาน Central Queensland University, Australia

รายละเอียด

ชื่อเรื่อง : Corrosion resistance of white cast irons in caustic solutions
นักวิจัย : McLeod, Alan. , Clegg, Richard E. , Coleman, Chris.
คำค้น : Cast-iron , Strategic basic research. , 840301 Alumina Production. , 091207 Metals and Alloy Materials. , 091404 Mineral Processing/Beneficiation. , Metal castings , Alloys , Corrosion -- Caustic -- High chromium white cast iron -- Temperature
หน่วยงาน : Central Queensland University, Australia
ผู้ร่วมงาน : -
ปีพิมพ์ : 2555
อ้างอิง : http://hdl.cqu.edu.au/10018/921512
ที่มา : McLeod, A, Clegg, R & Coleman, C 2012, 'Corrosion resistance of white cast irons in caustic solutions' in S Rosenberg (ed.), Proceedings of the 9th International Alumina Quality Workshop, AQW Inc, Brisbane, QLD.
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Proceedings of the 9th International Alumina Quality Workshop, Perth, Western Australia. Brisbane, QLD : AQW Inc, 2012. p.166-170 5 pages Refereed 9780646574240 , ACQUIRE [electronic resource] : Central Queensland University Institutional Repository.
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

High chromium white cast irons have proven to be a useful family of materials for wear resistant applications in high temperature Bayer liquor, as they combine high abrasion resistance with reasonable corrosion resistance. Plant experience has shown that certain alloy grades exhibit poor performance in high temperature applications at the end of the digestion circuit and it has been suggested that this is related to the corrosion resistance of these materials. In this paper, the corrosion behaviour of three grades of high chromium white cast iron was studied in pure caustic solutions at temperatures from 170ºC to 280ºC, with exposure times of up to 57 days. It was found that at lower temperature, the corrosion proceeded by a mechanism of degradation of the carbide-matrix interface with significant corrosion of the carbide component of the alloy. At higher temperatures, preferential corrosion of the matrix occurred in lower alloy grades, leaving carbide particles exposed to mechanical damage whilst in higher alloy grades, corrosion occurred by corrosion penetration along the carbide-matrix boundary. Corrosion resistance also correlated with the microstructure of the alloys and a number of the alloy constituents, including chromium content. This work will assist in our understanding of the mechanism of degradation of white irons in Bayer liquor and in the selection of white cast iron grades for application in high temperature digestion circuits.

บรรณานุกรม :
McLeod, Alan. , Clegg, Richard E. , Coleman, Chris. . (2555). Corrosion resistance of white cast irons in caustic solutions.
    กรุงเทพมหานคร : Central Queensland University, Australia.
McLeod, Alan. , Clegg, Richard E. , Coleman, Chris. . 2555. "Corrosion resistance of white cast irons in caustic solutions".
    กรุงเทพมหานคร : Central Queensland University, Australia.
McLeod, Alan. , Clegg, Richard E. , Coleman, Chris. . "Corrosion resistance of white cast irons in caustic solutions."
    กรุงเทพมหานคร : Central Queensland University, Australia, 2555. Print.
McLeod, Alan. , Clegg, Richard E. , Coleman, Chris. . Corrosion resistance of white cast irons in caustic solutions. กรุงเทพมหานคร : Central Queensland University, Australia; 2555.