Titanium alloy corrosion resistance and industrial titanium close, this is the titanium alloy in the chemical and shipbuilding industry to obtain a wide range of applications.

1. Titanium Gr2 Corrosion Resistance Data
Media Concentration （%） Temperature/℃ Corrosion rate/mm/a (Year) Corrosion resistance
Inorganic Acid
Hydrochloric Acid
1 Room Temperature /Boiling 0.000/0.345 Excellent/Good
5 Room Temperature /Boiling 0.000/6.530 Excellent/Bad
10 Room Temperature /Boiling 0.175/40.87 Good/Bad
20 Room Temperature/— 1.340/— Bad/—
35 Room Temperature/— 6.660/— Bad/—
Sulfuric Acid
5 Room Temperature /Boiling 0.000/13.01 Excellent/Bad
10 Room Temperature/— 0.230/— Good/—
60 Room Temperature/— 0.277/— Good/Bad
80 Room Temperature/— 32.660/— Bad/—
95 Room Temperature/— 1.400/— Bad/—
Nitric Acid
37 Room Temperature /Boiling 0.000/<0.127 Excellent/Excellent
64 Room Temperature /Boiling 0.000/<0.127 Excellent/Excellent
95 Room Temperature/— 0.0025/— Excellent/—
Phosphoric Acid
10 Room Temperature /Boiling 0.000/6.400 Excellent/Bad
30 Room Temperature /Boiling 0.000/17.600 Excellent/Bad
50 Room Temperature/— 0.097/— Bad/—
Chromic Acid 20 Room Temperature /Boiling <0.127/<0.127 Excellent/Excellent
Nitric Acid + 1:3 Room Temperature /Boiling 0.0040/0.127 Excellent/Excellent
Hydrochloric Acid 3:1 Room Temperature/— <0.127/— Excellent/—
Nitric acid + 7:3 Room Temperature/— <0.127/— Excellent/—
Sulfuric Acid 4:6 Room Temperature/— <0.127/— Excellent/—
Organic Acid
Acetic Acid 100 Room Temperature /Boiling 0.000/0.000 Excellent/Excellent
Formic Acid 50 Room Temperature/— 0.000/— Excellent/—
Oxalic Acid
5 Room Temperature /Boiling 0.127/29.390 Good/Bad
10 Room Temperature/— 0.008/— Excellent/—
Lactic Acid
10 Room Temperature /Boiling 0.000/0.033 Excellent/Excellent
25 —/Boiling —/0.028 —/Excellent
Formic Acid
10 —/Boiling —/1.270 —/Good
25 —/100 —/2.440 —/Bad
50 —/100 —/7.620 —/Bad
Tannic Acid 25 Boiling <0.127/<0.127 Excellent/Excellent
Citric Acid 50 Room Temperature /Boiling <0.127/<0.127 Excellent/Excellent
Stearic Acid 100 Room Temperature /Boiling <0.127/<0.127 Excellent/Excellent
Alkaline Solution
Sodium Hydroxide
10 —/Boiling —/0.020 —/Excellent
20 Room Temperature /Boiling <0.127/<0.127 Excellent/Excellent
50 Room Temperature /Boiling <0.0025/0.0508 Excellent/Excellent
73 —/Boiling —/0.127 —/Good
Potassium Hydroxide
10 —/Boiling —/<0.127 —/Excellent
25 —/Boiling —/0.305 —/Good
50 30/Boiling 0.000/2.743 Excellent/Bad
Ammonium Hydroxide 28 Room Temperature/— 0.0025/— Excellent/—
Sodium Carbonate 20 Room Temperature /Boiling <0.127/<0.127 Excellent/Excellent
Ammonia 20 Room Temperature/— 0.0708/— Excellent/—

2. Inorganic salt solution
Ferric Chloride/Fe3+ 40 Room Temperature //95 0.000/0.002 Excellent/Excellent
Ferrous Chloride/Fe2+ 30
Room Temperature /Boiling
0.000/<0.127 Excellent/Excellent
Lead Chloride 10 <0.127/<0.127 Excellent/Excellent
Cuprous chloride 50 <0.127/<0.127 Excellent/Excellent
Ammonium Chloride 10 <0.127/<0.000 Excellent/Excellent
Calcium Chloride 10 <0.127/<0.000 Excellent/Excellent
Aluminum Chloride 25 <0.127/<0.127 Excellent/Excellent
Magnesium Chloride 10 <0.127/<0.127 Excellent/Excellent
Nickel Chloride 5-10 <0.127/<0.127 Excellent/Excellent
Barium Chloride 20 <0.127/<0.127 Excellent/Excellent
Copper Sulfate 20 <0.127/<0.127 Excellent/Excellent
Ammonium Sulfate 20℃Saturation <0.127/<0.127 Excellent/Excellent
Sodium Sulfate 50 <0.127/<0.127 Excellent/Excellent
Lead Sulphate 20℃Saturation <0.127/<0.127 Excellent/Excellent
Cuprous Sulfate
10 <0.127/<0.127 Excellent/Excellent
30 <0.127/<0.127 Excellent/Excellent
Silver Nitrate 11 Room Temperature/— <0.127/— Excellent/—
Organic compounds
Benzene（HCl、NaCl） Steam and Liquid 80 0.005 Excellent
Carbon Tetrachloride Ditto
Boiling
0.005 Excellent
Tetrachlorethylene （Stable）
100%Steam and Liquid
0.0005 Excellent
Tetrachlorethylene （H2O） 0.0005 Excellent
Chloroform 0.003 Excellent
Chloroform（H2O） 0.127 Good
Trichlorethylene 99%Steam and Liquid 0.00254 Excellent
Trichlorethylene （Stable） 99 0.00254 Excellent
Formaldehyde 37 0.127 Good
Formaldehyde （2.5%H2SO4） 50 0.305 Good
Note：
1.Corrosion resistance is divided into three grades： Excellent——Corrosion resistance，Corrosion rate is below
0.127mm/a. Good——Medium corrosion resistance，Corrosion rate is between 0.127-1.27mm/a. Bad——Not
corrosion，Corrosion rate is 1.27mm/a.
2. Industrial pure titanium especially in neutral, oxidizing media and high corrosion resistance in seawater has high
corrosion resistance. Titanium corrosion resistance is good than aluminum, stainless steel and nickel alloy in sea
water. In the atmosphere of industrial, agricultural and marine environments, the surface of titanium product does not
discolor even after several years. Hydrofluoric acid, sulfuric acid, hydrochloric acid, orthophosphoric acid and some
hot concentrated organic acids on the corrosion of titanium . Titanium on a variety of concentrations of nitric acid and
chromic acid high stability in alkaline solution and most organic acids, inorganic salt solution corrosion resistance is
also high.
3. Titanium corrosion is carried out uniformly,does not occur local corrosion and intergranular corrosion.
4. Titanium alloy corrosion resistance and industrial titanium close, this is the titanium alloy in the chemical and
shipbuilding industry to obtain a wide range of applications.