Everything you need to know about the sacrificial anodes and corrosion mitigation for civil structures

Sacrificial Anodes

The sacrificial anode, also known as the galvanic anode, is the defence mechanism you need to prevent corrosion. Although it does not completely stop corrosion but they sacrificed themselves for it. As the name suggests, a sacrificial anode is a material that professionals install in pipes or tanks to sacrifice corrosion resistance. 

How does a sacrificial anode work?

The way a sacrificial anode works is the same as how an electrochemical cell works. The Sacrificial Anodes india has a type of protective metal on the cathode side that is the negatively charged side of the device. The more reactive metal or alloy is on the anode or positive side. It is important to note that the metal or alloy on the anode side has a greater potential difference than the metal on the cathode side. When these two metals are in place, the reaction will occur naturally.

An oxidation reaction takes place at the anode. Oxidation means that the substance loses electrons. While this was happening, the reduction reaction took place on the cathode side this means that the substance will gain electrons. Producing both an oxidation reaction and a reduction reaction is called a redox reaction. Oxidation on the anode side ensures that the sacrificial metal will corrode. The reduction reaction at the cathode signal prevents the metal on that side from eroding.

A sacrificial anode can protect a large number of different metals from corrosion.

  • Hulls in ship
  • Distillery
  • Pipeline
  • Water heater
  • Underground tank
  • Distribution system

Corrosion Prevention: How to protect building structures from environmental damage?

The methods of the Corrosion mitigation for civil structures are given by,

Selections of materials also prevent corrosion in building structures:

Corrosion is caused by environmental factors such as humidity and air salinity. However, the use of certain materials can limit or completely negate the damage caused by these conditions.

Strategic uses of rustproof steel:

Iron and steel are prevalent in almost all construction applications. However, some alloy steels have limited corrosion resistance due to their high carbon content. Choosing a low carbon steel alloy, such as 300 series stainless steel, can reduce the potential for corrosion damage. However, the structural strength characteristics are reduced, and the price tends to rise. For this reason, construction projects with less anti-corrosion requirements tend to use the less expensive 400 series stainless steel. 

Coated on top to prevent rust:

Many components can be identified with anticorrosive coatings. These come in several types with different properties. Epoxy coating provides good strength but is susceptible to colour fading. Alkyd coatings are similar in strength but are less susceptible to UV damage to the paint. Finally, polyurethane coatings tend to have the best strength and UV resistance characteristics.

Warranty inquiry:

Some component manufacturers state their parts warranties regarding corrosion resistance. However, it’s good to ask the supplier about any potential warranties. This is because it is a good indicator of both product performance and supplier confidence.

Using external protective equipment:

To reduce costs but improve rust protection in harsh environments, various coatings can be used with building components (typically steel) to prevent corrosion.