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Nantong Xingqiu Graphite Equipment Co., Ltd.

Characteristics of Graphite

Characteristics of Graphite

Characteristics of Graphite

Main physical and mechanical properties of impervious graphite materials

Performance Artificial electrode Phenolic dipping Compressed phenolic graphite pipe
Graphite Graphite YFSG1 YFSG2
proportion 2.2-2.27 2.03-2.07    
g/cm3 Density 1.14-1.6 1.8-1.9 1.8-1.93 1.97
hardness(brudzinski) 10-12 25-35    
water absorption 12-14   0.07  
porosity 28-32      
Weight gain rate   14-15    
Heat conductivity coefficient 100-110 100-110 27-35  
Compressive strength 20-24 60-70 86.2-120 69
Strength of extension 2.5-3.5 8-10 24.5-28.2 14.1
Flexure strength 8.5-10 24-28 60  
Impact toughness 1.4-1.6 2.8-3.2 2.7℃3.4  
Temperature urgent degeneration 150℃ cooled to 20℃ 20     39
Impregnating depth   20    
Permeability (thickness 10mm) Permeation 12-15    
Line expansion factor   No leakage under 2 times operating pressure No leakage under 0.8MPa  
Oxidizing temperature 2.5x10-6 5.5x10-6 24.75x10-6(96℃) 8.45x10-6
Operating temperature 400 170 170-180  
Heat stability (from 150℃-200℃ to 15-20℃ naturally )   >35 >30  
Elastic model   0.07-0.13 2.16x106 1.48x106
Matin heatproof     ≥170 300

Chemical stability of phenolic resin impregnated graphite

type Medium concentration temperature Corrosion resistance
acid


 
HCl, fatty acid, acetic anhydride, C18H34O2, HCOOH, C3H6O3, C6H8O7, tartaric acid, H3BO3, H3SO3, HCl Random <Boiling point Yes
HNO3 5 Room temperature Yes
H2SO4 <75 <120 Yes
H2SO4 80 <120 No
H3PO4 <80 <Boiling point Yes
HF <48 <Boiling point Yes
HF 48-60 <85 Yes
HBr 0.5 80 Yes
HBr Random <Boiling point No
HCrO 10 Room temperature Yes
HCrO 10 <Boiling point Yes
HCrO 40 Room temperature Room temperature
CH3COOH <50 <100 Yes
CH3COOH 100 200 Yes
alkali NaOH 10 <20 No
KOH 10 Room temperature Yes
NH3·H2O(ethanol amine) Random <Boiling point Yes
Salt solution Na2SO4, NaHSO4, NiSO4,ZnSO4, Al2(SO4)3, NH4HS, AlCl3, NH4Cl, CuCl2, FeCl2, SnCl4, (NH4)3PO4,NaNO3, HYPO Random <Boiling point Yes
ZnSO4 27 <Boiling point Yes
ZnSO4 Saturated 60 Yes
CuSO4 Random <100 Yes
AsCl3 100 <100 Yes
KMnO4 20 60 Yes
halogen F2     Yes
Dry chlorine 100 Room temperature Yes
Wet chlorine 100   No
Br, I2 100   Yes
Bromine water Saturated Room temperature Yes
Organic compounds CH3OH, isopropanol, C5H12O, C3H7OH, CH3CH2COCH3, C6H7N, C6H6, CH2Cl2, gasoline, C6H5Cl, C2H4Cl2, C2H2Cl4, chloroform, CCl4,C10H12O2 100 <Boiling point Yes
C2H6O 95 <Boiling point Yes
trichloracetic aldehyde 33 20 Yes
dichloro acetaldehyde   20-100 Yes
C3H3N   20-60 Yes
C8H8, ethylbenzene   20 Yes
CH3CHO 100 20 Yes
Others Diethyl Sulfate
CO(NH2)2
50
70
<Boiling point
Room temperature
Yes
Yes
Application example C6H4Cl2+C2H4Cl2+poly   100 Yes
aldehyde and ether condensate   20 Yes
Diffusion agentφ   20-60 Yes
Nekal   20 Yes
Nekal 20 100 Yes
Foaming agent 20 20 No
C2H5Cl+HCl+ethyl alcohol
Chlorine oil+Cl2+ethyl alcohol+water
Wet ClO2
NiSO4+NiSO4
ZnSO4+H2SO4
PhH+C2H4Cl2+Cl2+HCl
C5H12O4+HCl
Alkyl sulfonyl chloride
H2SO4+PhH
Protein hydrolysate
H2SO470 140-25
60
80-40
50-70
40-60
120-130
180
80-25
90
70-120
Yes
NO
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes

 

Characteristics of impervious graphite:

Excellent corrosion resistance

High thermal conductivity, small thermal expansivity, higher resistance of temperature difference

Medium without pollution, better mechanical processability, higher mechanical strength

Impermeability under certain liquid(gas) pressure;