What is the impact of synergy in erosion-corrosion and how can it be measured?

  • Thread starter bill nye scienceguy!
  • Start date
In summary, erosion-corrosion is a condition where weight loss occurs in a material due to electro-chemical corrosion, impingement attack from slurry, and a synergy effect combining the two. The majority of mass loss is caused by erosion, while corrosion involves the conversion of metal to an oxide. To quantify erosion, the level of oxide in corrosion-resistant materials can be measured, as well as the thickness and uniformity of the oxide layer. A quantification method similar to Faraday's law can be used for calculating material loss due to erosion. A reference for this information can be found in a university report.
  • #1
bill nye scienceguy!
127
0
In the condition of erosion-corrosion there is weight loss from the material by electro-chemical corrosion, impingement attack from the slurry and a third 'synergy' effect coming from the interaction of the other two effects.

My question is: what proportion of the weight loss tends to come from the synergy effect? If possible can you include a reference? I need to use this for a university report.
 
Engineering news on Phys.org
  • #2
In addition to this question, how can you make a quantitative evaluation wrt erosion if the velocity and particulate concentration of the impinging slurry are known?
 
  • #3
Well, erosion results in the majority of mass loss. Corrosion for the most part involves a conversion of metal to an oxide usually. Of course, corrosion could involve some amount of dissolution (of the base metal or oxide), as opposed to the erosion or wearing of the oxide.

Oxides can be converted to oxyhydroxides or hydoxides which are more soluble.

For corrosion resistant material, there is a certain level of oxide, such that the oxide 'passivates' the metal. The oxide may prevent additional oxidation (corrosion) from occurring, or it may only slow the diffusion of oxygen to the metal-oxide interface. That usually requires some thickness of oxide and little or no porosity or cracking in the oxide layer. It also means that the oxide is more or less chemically uniform, e.g. Al2O3.
 
  • #4
All this is true, however it doesn't really answer my question. I suppose what I'm really looking for is a way to quantify material loss due to the erosion process, equivalent to the Faraday's law method for calculating material loss due to electrochemical corrosion.
 

1. What is synergy in erosion-corrosion?

Synergy in erosion-corrosion refers to the combined effect of mechanical erosion and chemical corrosion on a material. It occurs when the two processes act together to accelerate material loss, resulting in more severe damage than either process would cause alone.

2. How does synergy affect the rate of erosion-corrosion?

Synergy increases the rate of erosion-corrosion by creating a feedback loop. As the material is eroded by the fluid, the surface is exposed to new areas for corrosion to occur. This corrosion then weakens the material, making it more susceptible to further erosion, which in turn exposes more surface area for corrosion. This cycle continues, leading to a rapid deterioration of the material.

3. What factors contribute to synergy in erosion-corrosion?

The main factors that contribute to synergy in erosion-corrosion include the properties of the fluid, the material being eroded, and the environmental conditions. For example, high flow velocities, turbulence, and corrosive environments can all increase the likelihood of synergy occurring.

4. How can synergy in erosion-corrosion be prevented?

Preventing synergy in erosion-corrosion requires a multi-faceted approach. This can include selecting materials with better resistance to both erosion and corrosion, controlling fluid flow and velocity, and implementing protective coatings or inhibitors. Regular maintenance and monitoring can also help identify and address potential issues before they lead to significant damage.

5. What are some real-world examples of synergy in erosion-corrosion?

Synergy in erosion-corrosion can occur in a variety of industries and applications. Some examples include the erosion-corrosion of oil and gas pipelines due to high flow velocities and corrosive fluids, the erosion-corrosion of aircraft components exposed to saltwater environments, and the erosion-corrosion of ship propellers due to the combined effects of water flow and corrosive marine environments.

Similar threads

  • Engineering and Comp Sci Homework Help
Replies
2
Views
2K
  • Chemistry
Replies
4
Views
1K
Replies
1
Views
706
  • Special and General Relativity
Replies
13
Views
1K
  • High Energy, Nuclear, Particle Physics
Replies
4
Views
1K
  • Mechanical Engineering
Replies
1
Views
3K
  • Nuclear Engineering
Replies
25
Views
4K
  • Sci-Fi Writing and World Building
3
Replies
90
Views
5K
Replies
1
Views
547
  • Materials and Chemical Engineering
Replies
12
Views
2K
Back
Top