Tank Pickling and Passivation

Tank / System (BD tank) Pickling and Passivation

Tank/ system pickling is carried out to remove metal surface impurities like iron oxides, rust, or stain to ensure the surface is rust-free and smooth. This is particularly important and crucial for butadiene (BD) tank storage and pipelines, where the presence of rust, oxygen and water will end up with formation of butadiene polymer, or commonly known as ‘popcorn’. This phenomenon is highly not desired, as the popcorn formation will be in propagation mode once it started and might resulting in occupying the full space and rupture the structure or piping, leading to BD leakages and other unwanted incidents.

Besides, pickling help to remove the surface dirt and rust, leaving the metal surface clean and smooth for passivation to take place. Passivation is a procedure to form a thin film layer of protection to the metal surface, making it more resistant to corrosion. Therefore, it is always good to couple both pickling and passivation process for the best code of practice

Why pickling and passivation?

1

Remove impurities on the metal surface (Pickling)
2

Protect metal surface and integrity (Passivation)
3

Increase the durability of the metal tank, prolong service life span of storage tanks (Pickling and Passivation)

Pickling process uses acid to remove metal surface impurities like iron oxide before passivation process. This is to ensure the metal surface is smooth and able to form uniform protective layer after passivation.

With the joint effort of our engineers and technical team, we established our own system, procedure and cleaning chemicals use to carry out tank pickling and passivation in effective and safe manner.

Our qualified engineers are well verse in evaluating the surface/ dimension of the area to be pickled and passivated, and then design a customised pickling and passivation system by selecting the right spraying nozzles, circulation tank volume, pump sizing etc.

We can carry out pickling and passivation on horizontal storage tank, ISO tanker, spherical tank etc.

Besides, we can design a system for general tank cleaning with the use of tank washing spray nozzle with water, by physical means or with chemicals for specific condition, depending on the systems

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