1-6 Ð Ï Te (mass%) 0% 0.3% 0.5% 0.8% 1.0% 2.0% 2 Î 1 6

31 6 Ʋ ± Vol.31 No.6 2011 12 Journal of Chinese Society for Corrosion and Protection Dec. 2011 Te-Ni-Cr Æ 3.5%NaCl»±½ ÁÄ à ÅÀ (Â Ç ¼ Ì ÓÎ Ú Â 730050) : Ë ÖÎ Î Te-Ni-Cr ÍÚ ±± Ú Ë ÁÐÈ Ø ¹ Ö± ÑØ Ö EDS XRD ± Ø Ó» Te-Ni-Cr Ø É Û Ö Ø«Ø µ ÅØ Ø Ù ÐÈ Á Ø Ö ÄÂ Ó XRD ¼ ± Ni 2O 3 Ø Ò ± ÖÓ Te-Ni-Cr Ø ¼«ÖØ «ß : Te-Ni-Cr NaCl ± : TB332 ² Û : A ² Ú : 1005 4537 2011Å06 0462 05 1 ¾ ÌÝ Ñ µ ½Đ Ï««ØÌÝÒ Ò «² ̾ Ò ÌÀ Ñ ÀÔÚ ÐÌÙÞÌÝ Ñ [1] ÇÌÒº ÙÒ ÅĐ «ĐÌÙ Òº Đ Å ¾ ««ĐÌÙ Ú«ÍÒÌÙ Ï Đ Đ± ÐÕ Å Õ³ Đß½«Å Õ ºÊÐ«Æ Ï «Ð ÕÍ ÃÁ [2] Åß ĐÌÙ Đ ÕÅ «Òº«Å Ð ÆÚ Đ Æ Â Òº«¾ Þ À Òº Ô¼«[3] ¾ Åß «Ç NiCr Å Te ÐÍÕ Í Te-Ni-Cr «Òº Te Åß Ç Đ Æ«± ĐÞĐ «À Te Ð ³ Å ² ÒºÁ» À Ô È Î «3.5 mass% NaCl «¾ «Đ Ð Í Te-Ni-Cr Ð : 2010-12-13 Å : Å 1956 Ë ÉÍ Ô¼ È ¹ ²Ô¼ ÐË ¼ : Å E-mail: ydst@163.com «Í¾Æ Õ Ð Ni-Cr ÌÙ Đ Æ 2 Đ Åß¼ ½ ßÄ Ä Ï 1 ß ÕÍ NiCr ß Õ ß 2 Æ ÌË Ü «Ï À «ß«ºÝØ Å ¼«Â 1-6 Ð Ï Te (mass%) 0% 0.3% 0.5% 0.8% 1.0% 2.0% 2 Î 1 6 Ð Te Æ Ï Ï À ¼ «ÚÕ Ð ½ «Ù à ÙÐ ³» «Ð» Æ Ê φ6.0 mm 12 mm 800 À Ê ÞÆ «Ù ßÑÒ Úµ» «½ º É Ã» FA2004 Đ µ»ã Ï «µ Ê Ð² Ê«Î Ð ÕЫ½ ¾ «Ð Ü ÌÙ 168 h ³Î Ð µä ÙÌ «1:1 Ð µ Õ Ã Ï «Î Đ Á Ð À Ç«Đ Ð Õ Ð«X Ä Ä Õ Ä 3 3.1 µ MEF4A À Ð ÇÏ Te 1a ¼Ï Te 1b

6 { Lw : Te-Ni-Cr ` 9 3.5%NaCl 9 Yt%Z,o/ 463 Table 1 Range of Ni-Cr alloy powder composition (A) and chemical compositions of Ni-Cr alloy (B) (mass%) Ni Cr Mo Si B C Fe Rest A 50 60 16 19 2 4 3 5 2.84 0.5 1 12 15 <1.0 B 56.5 17.55 4.21 4.02 2.84 0.73 13.65 <1.0 remarks mesh count 150 280 HRC 60 65 mesh count 150 280 HRC 60 65 Table 2 Mass fraction of Te designed and measured (mass%) Sample Mass fraction Mass fraction number of Te designed of Te measured 1 0 0 2 0.3 0.29 3 0.5 0.47 4 0.8 0.79 5 1.0 0.97 6 2.0 1.94 # 1 a A ;V # Te s < _q_ *q75 1f! s bsc s B t ko E S koz K? OE so okk 8{ X ' /l$9 H6_ s*q fk In _ sb( ;f P * 3 *X 5 f} sb( ;f} 1 2 3 s1t;# 2 X a # X 3 + Te-Ni-Cr _ s { α H bc ko 1 + _ s β H sc ko 2 + γ H * 3 A ; V Te-Ni-Cr _ { sb( # NiCr _ { s B( f Te-Ni-Cr _ X β H s B( # γ H f # α HfVY β H+_ s WH 3.2 "fu7 V Æ $Y f l _+$Y _ KZVf}sV Q >` (1) (2)Æ V = wo w1 st D = 8.76 V ρ Fig.1 Porosity metallograph of the alloys (a) with Te, (b) without Te Table 3 The Microhardness of alloy (HV) Sample number Testing value 1 5 841 896 891 885 Mean 829 887 871 1 2161 2246 2161 2129 2246 2129 2179 2 1564 1413 1650 1514 1605 1431 1529 3 975 866 975 991 918 961 951 (1) (2) X wo +f}$y Z (g) w1 +$ Y $Y 5f Z (g) s +f} s*q } (m2 ) t +$ YX Æ (h) ρ + 4 sp (g/cm3) V +$Y f (g/m2h) D + $YO * a s $Y (mm/a)[4,5] M = Ty f $Y s $Y 2 + 2.54 10 4 mm/a z9 y [6] Te-Ni-Cr _ 8 3.5%NaCl 8 X $Y f Te W Zs0 ' m& G;# 3 a A ;V 8 3.5% NaCl 8 X ; +} Te s < s$y f Ni-Cr 0b 1_ # vbs $Y f Te WZs A Qf f 8 Te WZ+ 0.8%X $Y f Fig.2 Backscattering picture of tellurium-nickel-chromium Alloy dnm Q Q 0.06633 mm/a j 1X Æj 1 q } s V Q+ 0.051762 g/m h _# 3 s;f P*v 2

464 Å 31 Table 4 Corrosion rate of the alloys Sample number 1 2 3 4 5 6 Corrosion rate /mm a 1 0.07323 0.07124 0.06989 0.06633 0.07547 0.07529 /g (m 2 h 1 ) 0.058774 0.057871 0.057559 0.051762 0.063883 0.066983 D /mm a -1 0.080 0.076 0.072 0.068 0.064 0.060 0.056 0.052-0.5 0.0 0.5 1.0 1.5 2.0 2.5 Mass fraction of Te /% 0.080 0.076 0.072 0.068 0.064 0.060 0.056 0.052 Fig.3 Corrosion rate curves with Te content in 3.5% NaCl solution Fig.4 SEM morphology of sample 6 Ð Te Å «Đ Ò Ò «¼ Te Ï ««ÐÅ 1.0%Te «Đ. «Õ Â Ê È Ê Ñ«È¼ Ϋ½Û Ä Ú¹ 4 «Ð Ê «Ë¹ Ò «½ ÇÝ Á«È ÅĐ«Đ 3.3 º Ý Å Å «ÌÙ ÅÑÝ Æ Ó«ÊÐ ( Ô ) JSM-6700F Đ «Ê 168 h е Õ Ð«5 5a d Î«Õ Ê Ð «ÅÕ»ÅÕ Õ ÊÐ Ø Ú Đë5b e Î«Ð Ç «ÆÕ «¼ Ç Ç ¾ 5c«f Ϋ1 3 Ð V /g m -2 h -1 È Đ ««Ç«±Ö Ç Ü «ÕÐ Ü ¼Ò Ê Ò «ÛÅ ¾ «Î «² Ï È «Å Î É Ï Te ÁÐ«Ç «Ê Õ Ç È Đ «Õ Đ «Đ Î 3.4 Þ XRD ¹ µ 1 3 Ð ¾ 168 h Õ XRD 6 6 À È«Õ Ä 1 Ð Ä È«ÀÕ 3 Ð Ä È Î«Te-Ni-Cr 3.5%NaCl Ni 2 O 3 ßÑ ÒÏÕ À Ä Ni 3 Te 2 À«É ÅÏÕ À«¹ ÏÕ Ð Àà ÊÄ º«À 3.5 µ NaCl «ĐÑ 3.5%NaCl Đ Ï ß«½ Ò 3.5%NaCl ĐÑ «ÞĐ Đ Í ÊÈ [8] Ò ÌÙ Ð ± Ù [9] 3.5%NaCl «Þ Đ Ê Æ Đ Ù Ò «ÞĐÊÈ Ni Fe ÊÈ ÞĐ Æ Fe Fe 2+ + 2e (3) Ni Ni 3+ + 3e (4) Fe 2+ O 2 Fe 3+ + e (5) Ò Õ O 2 Ä Đ«ÊßµĐÑ Đ Æ 1/2O 2 + H 2 O + 2e 2OH (6) Te-Ni-Cr Î Đ «Te Ï Å«Đ Å «Å 0.8% T e «Đ ÒÑ 3.5%NaCl «ÊÐ «É

6 ß ÄÛ : Te-Ni-Cr 3.5%NaCl ر Ó» 465 Fig.5 SEM morphologies after wiping off corrosion products of samples 1 and 3 Fig.6 X-ray diffraction diagram of alloy È À «Ï Te Þ Î Te-NiCr λÅÕ Đ ÆTe Å ß Ç «Ô Ç Õ Õ Ñ ÃÃßÂ ß Õ«Å ËÔÑÈ «Þ Ï È Te Ð«Ð Ñ ½««ÄÑ «Î Æ Ð ÊÄÕ Ñ «Te Å Ð ÌÙ «Đ Î 4 (1) Ð Te Å «³ Ç «Å ÌÙ Đ ÐÅ 0.8%Te «Đ ÒÑ (2) 3.5%NaCl «Te-Ni-Cr Ê ĐÑ «Ð «Ç «Å Te»Å Te É ÁÐ«Ç ½ ËÔ«Þ ¾ Î (3) 3.5%NaCl «Ni ßÑ Fe ßÑ Ü Ü ³ [1] Wang D D, Li X B. General situation of seawater corrosion-resistant nickel-based materials [J]. Powder Metall Mater. Sci. Eng., 2003, 8(2): 147-151 (³, É ¹. «ÎÛ³ ÙÔ¼¹ [J]. Ð ² É, 2003, 8(2): 147-151) [2] Xie M H, Wang X M, Chen H X, et al. Resources applications and up-to-date development of extraction separation technology of Te [J]. Sichuan Nonferrous Met., 2005, (1): 5-8 (ÌÜÚ, ³ÏÜ, À ÏÜ. Ù ½ ² Å Ô ¼ [J]. Þ Ô, 2005, (1): 5-8) [3] Yang R C, Wang H, Zheng L P, et al. Characteristics and research trends of high performance Ni-base corrosion Resistant Alloys [J]. Mater. Rev., 2001, 15(11): 21-23 (Ü Æ, ³Ô, ÂÊ Ü. «Ù ²Ô¼ È [J]. Ñ, 2001, 15(11): 21-23) [4] GB10124-1988. Metal Material Uniform Corrosion Full Immersion Test Method in Lab[S]. 1990 (GB10124-1988. Ô Û ³ ² Û [S]. 1990) [5] Liu Y H, Zhang P F. Metal Corrosion Theory [M]. Beijing: Aviation Industry Press, 1993 ( Ú, Æ. Ô³ ºÈ [M], : Ï Å, 1993) [6] Schumacher M. Seawater Corrode Manual[M]. Beijing: National Defense Industry Press, 1985. 81-97 (Schumacher M. ÎÛ³ [M]. : Ç Ï Å, 1985: 81-97) [7] Huang G Q, Yu C J. The Corrosion behavior of nickel alloys in seawater [J]. Mater. Prot., 2004, 37(3): 16-19 (ÖÄ. «¾ÎÛ Ù³ ¹ [J]., 2004, 37(3): 16-19) [8] Liu X C, An C Q. Metal Corrosion [M]. Beijing: National Defense Industry Press, 2002: 54-58

466 Å 31 (, Æ. Ô³ [M]. : Ç Ï Å, 2002: 54-58) [9] Ye K M. Overview of Corrosion and Protection[M]. Beijing. People s Education Press, 1981: 114-115 ( Ù. Ô³ ² ¹ [M]. : Ù µï Å, 1981: 114-115) CORROSION BEHAVIOR OF Te-Ni-Cr ALLOY IN 3.5% NaCl SOLUTION SU Yixiang, BAO Yandong, LIAO Naifei, HOU Fenggang, DAI Yingqiu State Key Laboratory of Gansu Advanced Nonferrous Matel Materials, Lanzhou University of Technology, Lanzhou 730050 Abstract: A new Te-Ni-Cr alloys were prepared by powder metallurgy technology and the corrosion resistance of Te-Ni-Cr alloys were studied by OM, SEM, EDS and XRD in the 3.5% sodium chlorine solution. The results show that the microstructure of the alloys are changed by Te. There are bone-like dark gray structure on the surface of the alloy, playing protective role. Ni 2 O 3 and iron oxide were determined by the analysis of XRD. The calculated corrosion rate shows that Te-Ni-Cr alloy increases the corrosion resistance than tellurium-free alloy. Key words: Te-Ni-Cr alloy, NaCl solution, corrosion resistance