Technical advantage
Details
Excellent corrosion resistance of titanium alloy
◎Nine excellent corrosion resistance
(1)Resistance to (sulfide) stress corrosion cracking
(2)Resistance to hydrocracking
(3)pitting corrosion resistance
(4)Crack corrosion resistance
(5)Corrosion resistance of H2S and CO2 under high temperature and high pressure
(6)Resistance to seawater/salt spray corrosion
(7)abrasion-resistance
(8)Resistance to organic acids and bases
(9)Corrosion-resistant gas
◎Evaluation test of stress corrosion cracking resistance-----Excellent SSC resistance
(1)Stress Corrosion cracking (SSC) test in solution A with A method
(2)Stress corrosion cracking (SSC) test under Operating stress
|
The loading stress is 100% ysmin (758 MPa) |
Total pressure/MPa |
12 |
Temperature/℃ |
160 |
H2S partial pressure/MPa |
≦1.2 MPa |
CO2 partial pressure/MPa |
6MPa |
Test time/h |
720 |
Ion content/mg·L-1 |
CO32-/0, HCO3-/189, OH-/0, Cl-/128000,SO42-/430, Ca2+/8310, Mg2+/561, K+/6620, Na+/76500 |
pH |
2.5 |
◎Resistance to hydrocracking(HIC)
Titanium alloy tubing material has passed NACE TM 0284-2000 standard:
Crack sensitivity (CSR):0
Crack length rate (CLR):0
Crack thickness ratio (CTR):0
Titanium alloy is not sensitive to HIC
◎Evaluation of resistance to point corrosion
◎Evaluation test of high temperature and high pressure containing H2S / CO2 under simulated working condition
Working condition
Temperature 160 °C, partial pressure of H2S 2.66 MPA, partial pressure of CO24.5 MPA, cl-: 120000PPM, flow velocity 3M / S
At 155 °C, H22S partial pressure 4MPA, CO2 partial pressure 4.5 MPA, cl-: 120000ppm, Flow Velocity 3M / S
Temperature 60 °C, partial pressure of H2S 2.0 MPA, partial pressure of CO23.5 MPA, cl-: 120000PPM, flow velocity 3M / S
Items |
Average weight before test(g) |
Average weight after test(g) |
Mass loss(g) |
Sample area(mm2) |
Corrosion rate(mm/a) |
|
Working condition |
1# |
4.8751 |
4.8748 |
0.0003 |
1075.38 |
0.0008 |
2# |
4.8448 |
4.8448 |
0.0000 |
1068.03 |
0 |
|
3# |
5.2134 |
5.2130 |
0.0003 |
1082.73 |
0.0007 |
Uniform corrosion rate is less than 0.001mm/a
◎Evaluation of seawater /salt spray corrosion resistance
◎Excellent erosion resistance
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