Corrosion Inhibitors for metals
Corrosion is a very common problems that have economic implications costing billions of dollars each year. The use of corrosion inhibitors are an effective way to reduce metal corrosion. The inhibitors act by adsorbing onto the metal surface, thus providing an barrier to the corrosive environment. The advantages of organic corrosion inhibitors include:
- Presence of film prevents uniform corrosion attack
- Organic inhibitors increase the activation energy on the metal surface (passivation)
- Organic inhibitors have been shown to eliminate corrosion over wide range of pH values
- Inhibitors adsorb and form a thin polymeric layer
Corrosion rate in a conductive DI water solution (Å/min) |
Corrosion rate with an organic inhibitor in a conductive DI water solution (Å/min) |
Corrosion Rate Reduction |
|
Fe |
7.35 |
0.552 |
92% |
Mn |
124 |
3.5 |
97% |
Co |
4.42 |
0.17 |
96% |
Cu |
1.76 |
0.015 |
99% |
Ni |
1.33 |
0.02 |
99% |
These corrosion inhibitors have also been shown to be very effective over a wide range of pH conditions.
Element |
Organic Corrosion Inhibitor Concentration |
Iron |
1-5% |
Nickel |
1-5% |
Cobalt |
2-10% |
Copper |
1-5% |
Manganese |
5-10% |
Anticorrosion Products
Corrosion Inhibitors -for addition into cutting fluids, lapping lubricants, IPA rinse solutions and cleaning solutions. |
|
Applications
The protective organic coating only requires several monolayers on the surface. The coating can be applied by dipping or spraying.