Investigation of the corrosion resistance of vitreous-enamel coatings in formic-acid-manufacturing media

1987 ◽  
Vol 23 (12) ◽  
pp. 623-624
Author(s):  
P. S. Shkolyar ◽  
A. P. Manzhelii ◽  
O. V. Bobovich ◽  
T. P. Borodai
Keyword(s):  
Corrosion Resistance ◽  
Formic Acid ◽  
Vitreous Enamel

COMMERCIALLY PURE TITANIUM GRADE 12

Alloy Digest ◽  
1989 ◽  
Vol 38 (9) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Titanium Alloy ◽  
Formic Acid ◽  
Chemical Industry ◽  
Pure Titanium ◽  
Heat Treating ◽  
Commercially Pure Titanium ◽  
Bend Strength ◽  
Commercially Pure ◽  
Titanium Grade

Abstract Commercially pure wrought titanium, Grade 12 is used in the chemical industry where conditions are mildly reducing or varying between oxidizing and reducing. It is immune to formic acid, aerated or non-aerated. This datasheet provides information on composition, physical properties, elasticity, tensile properties, and bend strength. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ti-93. Producer or source: Titanium alloy mills. Originally published August 1989, revised September 1989.

Effect of diffusion alloying time on corrosion resistance and surface conductivity of niobium-alloying-modified AISI430 stainless steel for DFAFC bipolar plate

2019 ◽  
Vol 66 (2) ◽  
pp. 222-229 ◽  
Author(s):  
Jixin Han ◽  
Haibang Zhang ◽  
Juncai Sun ◽  
Wenyuan Zhao ◽  
Jinlong Cui
Keyword(s):  
Electrical Conductivity ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Formic Acid ◽  
Corrosion Current ◽  
Bipolar Plate ◽  
Surface Conductivity ◽  
Content Type ◽  
Diffusion Layers ◽  
Surface Electrical Conductivity

Purpose The purpose of this study is to improve the surface electrical conductivity and corrosion resistance of AISI430 stainless steel (430 SS) as bipolar plates for direct formic acid fuel cell (DFAFC). Design/methodology/approach The niobium diffusion layers have been successfully synthesized on 430 SS substrate by the plasma surface diffusion alloying technique under different diffusion alloying time. Findings The surface morphology of Nb-modified 430 SS prepared under the diffusion alloying time of 2 h is more homogeneous, relatively sleek and compact without surface micropore and other common surface blemishes. The potentiostatic and potentiodynamic polarization measurements manifest that Nb-modified 430 SS prepared under the diffusion alloying time of 2 h enormously ameliorate the corrosion resistance of bare 430 SS compared with other Nb-modified 430 SS samples and its corrosion current density is maintained at −1.4 µA cm−2 in simulated anodic environment of DFAFC (0.05 M H2SO4 + 2 ppm HF + 10 M formic acid at 50 °C). Originality/value The effect of diffusion alloying time on the corrosion resistance and surface conductivity of Nb-modified 430 SS has been carefully studied. The Nb-modified 430 SS samples prepared at the diffusion alloying time of 2 h have the best surface electrical conductivity and corrosion resistance in the simulated anodic environment of DFAFC.

scholarly journals Influence of formic acid on the microstructure and corrosion resistance of Zn–Ni alloy coatings by electrodeposition

2014 ◽  
Vol 258 ◽  
pp. 232-239 ◽  
Author(s):  
G.A.G. Pedroza ◽  
C.A.C. de Souza ◽  
M.D. de Jesus ◽  
L.R.P. de Andrade Lima ◽  
D.V. Ribeiro
Keyword(s):  
Corrosion Resistance ◽  
Formic Acid ◽  
Ni Alloy

Corrosion of Metals by Weak Acids Under Heat Transfer Conditions

CORROSION ◽  
1961 ◽  
Vol 17 (4) ◽  
pp. 173t-176t ◽  
Author(s):  
N. D. GROVES ◽  
C. M. EISENBROWN ◽  
L R. SCHARFSTEIN
Keyword(s):  
Heat Transfer ◽  
Weight Loss ◽  
Corrosion Resistance ◽  
Acetic Acid ◽  
Phosphoric Acid ◽  
Formic Acid ◽  
Stainless Steels ◽  
Good Corrosion Resistance ◽  
Corrosion Rates ◽  
Transfer Device

Abstract Weight-loss measurements were made on six alloys: Types 304L and 316 stainless steels, Carpenter No. 20-Cb, Hastelloy B, Inconel and Monel in solutions of 10 percent, 50 percent and concentrated acetic acid, formic acid and phosphoric acid. A special heat transfer device was used to compare corrosion rates obtained with and without heat transfer. Metal temperatures of 230 F, 257 F and 284 F were studied. Carpenter No. 20-Cb and Hastelloy B consistently showed good corrosion resistance. Of the alloys tested Monel was the most sensitive to the effects of heat throughput. 4.3.2, 6.2.5, 6.3.10, 3.5.9

Microstructures of Ti-1.5 w/o Ni Alloys with Mo and A1 Additions

1975 ◽  
Vol 33 ◽  
pp. 54-55
Author(s):  
Anna C. Fraker
Keyword(s):  
Corrosion Resistance ◽  
Beneficial Effect ◽  
Crevice Corrosion ◽  
Local Corrosion ◽  
Precipitate Size ◽  
Ni Alloys

Small amounts of nickel are added to titanium to improve the crevice corrosion resistance but this results in an alloy which has sheet fabrication difficulties and is subject to the formation of large Ti2Ni precipitates. These large precipitates can serve as local corrosion sites; but in a smaller more widely dispersed form, they can have a beneficial effect on crevice corrosion resistance. The purpose of the present work is to show that the addition of a small amount of Mo to the Ti-1.5Ni alloy reduces the Ti2Ni precipitate size and produces a more elongated grained microstructure. It has recently been reported that small additions of Mo to Ti-0.8 to lw/o Ni alloys produce good crevice corrosion resistance and improved fabrication properties.

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