CORROSION OF PURE IRON AND TWO COMMERCIAL STEELS BENEATH ZnCl2-KCl DEPOSITS IN A CONTROLLED ATMOSPHERE CONTAINING HCl AT 500℃

Acta Metall Sin

2004, Vol. 40

Issue (4): 388-392 DOI:

Research Articles

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CORROSION OF PURE IRON AND TWO COMMERCIAL STEELS BENEATH ZnCl2-KCl DEPOSITS IN A CONTROLLED ATMOSPHERE CONTAINING HCl AT 500℃

ZHANG Ke; NIU Yan; WU Weitao

State Key Laboratory for Corrosion and Protection; Institute of Metal Research; The Chinese Academy of Sciences; Shenyang 110016

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ZHANG Ke; NIU Yan; WU Weitao. CORROSION OF PURE IRON AND TWO COMMERCIAL STEELS BENEATH ZnCl2-KCl DEPOSITS IN A CONTROLLED ATMOSPHERE CONTAINING HCl AT 500℃. Acta Metall Sin, 2004, 40(4): 388-392 .

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Abstract The corrosion behaviors of pure iron and two commercial steels were examined in presence of ZnCl2--KCl deposits in controlled atmosphere containing HCl at 500℃. All of three materials suffered accelerated corrosion by forming thick oxide scales, and complex chlorides mixed molten salts appeared between the oxide scales and substrate materials. However, materials with higher Cr content have better corrosion resistance due to the formation of Fe--Cr spinel or chromia in the inner part of oxide scales. The mechanism for the corrosion accelerated by molten chlorides deposits is discussed.

Key words: pure iron steel NF616 steel SS304

Received: 18 April 2003

ZTFLH:

TG172.3

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y2004/V40/I4/388

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WU Yaqiao; YANG Lin; ZHAO Zhongjian; GAO Lifeng;XU Yongbo; LU Zhenjia (Polytechnic University; Shenyang 110023)(Laboratory of Atomic Imaging of Solids; Institute of Metal Research; Chinese Academy of Sciences; Shenyang 110015)( State Key Laboratory for Fatigue and Fracture of Materials; Institute of Metal Research; Chinese Academy of Sciences; Shenyang 110015)(Manuscript received 1995-12-12). SURFACE LAYER STRUCTURE OF PURE IRON TREATED BY ION-RE-NITRIDATION[J]. 金属学报, 1996, 32(7): 705-710.

[2]

WU Yaqiao; YANG Lin; ZHAO Zhongjian; GAO Lifeng XU Yongbo; LU Zhenjia(Shenyang Polytechnic University; Shenyang 110023) (Laboratory; of Atomic Imaging of Solids; Institute of Metal Research; Chinese Academy; of Sciences; Shenyang 110015)(State Key Laborutory for Fatigue and Fracture of Materials; Institute of MetalResearch; Chinese Academy of Sciences; Shenyang 110015). A STRUCTURAL OBSERVATION ON IONIZED RE METALLIZING LAYER OF PURE IRON[J]. 金属学报, 1996, 32(6): 594-598.

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