How to effectively address corrosion and protection of equipment in petrochemical wastewater systems?
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Most of the wastewater treatment systems consist of open concrete tanks, and the sulfur- and alkali-containing wastewater from production causes severe corrosion to the concrete. In particular, the inner wall surface deteriorates and peels off, exposing the rebar, which leads to localized water seepage and leakage. Given this overall situation, as a corrosion engineer, how can one carry out effective work in the area of corrosion prevention and protection?
Pre-treat the inner surface of the concrete: 1. Line it with fiberglass to provide corrosion protection； 2. Polyurea heavy-duty anti-corrosion coating
Polyurea corrosion-resistant materials do indeed offer good performance in preventing corrosion in water and wastewater applications. However, before using such materials, it is essential to understand the properties of the corrosive medium as well as the corrosion resistance of the materials, so that the advantages of the anti-corrosion materials can be utilized.
When using polyurea in petrochemical wastewater, it is essential to pay attention to the components of corrosive substances present in the wastewater; polyurea materials cannot be used for corrosion protection if the wastewater contains organic solvents.
Polyaniline is not bad either; a comparison shows the difference :)
For corrosion protection of the inner walls of petrochemical wastewater tanks, it is necessary to consider the composition of the wastewater, the corrosion resistance of the anti-corrosion materials used against such media, and whether the tank is open or closed. If it is a directly applicable material, it is first necessary to understand its various performance indicators and application records. Constructibility must be taken into account.
DSF22 Wet Surface Anti-corrosion Coating – Product Description: It is an environmentally friendly thick paste-type coating that consists of a Component B made up of modified epoxy resin, special curing agents, pigments, fillers, and various additives; while Component A is a solvent-free primer-curing agent. *It features the ability to be applied on surfaces at normal temperature, in humid conditions, and underwater; it cures rapidly and exhibits good film-forming properties. *The paint film possesses properties such as corrosion resistance, as well as resistance to seawater, sewage, and oils. Design purpose: It is used for protecting structures in humid environments such as underwater tunnels and mines, as well as for protecting areas such as docks in tidal zones and bridge pile foundations. It can also be used for coating protection of the parts of ships and offshore drilling platforms that are below the waterline. Additionally, it is applicable to protection and maintenance projects for various storage tanks, containers, old wet gas storage tanks, pipeline valves, water valves, steel piles, sewage treatment tanks, pools, reservoirs, and cave repositories. Since there is no emission of toxic substances from solvents, it eliminates the risk of fire or toxicity when working in tight spaces on ships, on the inner walls of pipelines, or inside sealed tanks.
Our acid- and alkali-resistant anti-corrosion coating can be used
Regardless of the material used for corrosion protection, if it yields good results, I hope practical examples can be provided to illustrate this.