Evidence-first editorial standard
This guide separates observed facts, engineering assumptions and data that still require confirmation. It does not promise a universal service life or replace the exact product data and project specification.
A scrubber wears where gas, dust and liquid meet at speed
In a venturi scrubber, dust-laden gas is accelerated through a throat where scrubbing liquid is injected; the droplets capture the dust and the mixture is slowed, turned and separated. The liquid soon carries abrasive solids and, depending on the gas, acids or chlorides. Erosion and corrosion therefore act together, and a lining must resist both. In steel plants this is part of the picture in steel plant wear protection by circuit.
The throat and the flooded elbow are the hotspots
The venturi throat sees the highest gas velocity with entrained particles and droplets; adjustable throats add moving parts such as dampers or plumb bobs that wear at their edges. Below it, the flooded elbow or wet approach turns the flow and takes erosion on the outer wall, even when a liquid pool is designed to protect it. The separator inlet, where the flow enters tangentially, wears on the opposite wall.
Shaped ceramic and silicon carbide suit the throat
The throat and adjustable elements have tight geometry and the highest erosion rate; shaped parts made to drawing in IC CUSTOM reduce joints exactly where the velocity peaks. For the most severe erosion with chemical exposure, silicon carbide is often compared with alumina, as discussed in silicon carbide or alumina. Tiles in IC TILE cover the elbow walls and separator inlet.
The bond line usually fails before the ceramic
Scrubber liquids attack many adhesives and the steel behind them; once the liquid reaches the bond line at a joint, the tiles let go even if their face is intact. The adhesive must be chosen for the liquid’s chemistry and temperature, joints must be sealed, and the steel prepared to a standard that resists under-film corrosion. The selection criteria are in choosing an adhesive for ceramic tiles and chemical attack on the bond line.
The sump, pumps and fans complete the system
The scrubber sump collects the slurry and feeds the recirculation pumps, with wear at the inlet and the pump suction; the induced-draft fan after the scrubber erodes if droplet carry-over is high, as covered in fan casing wear liners. Recording wear at each of these points at every stop shows which part limits the campaign, and whether the throat or the bond line is the real problem.
What to send for a scrubber lining quote
Send the scrubber drawings (throat, elbow, separator, sump), gas flow and temperature, the dust and its source, the scrubbing liquid with pH, chlorides and solids content, the current lining and how it failed, and the outage window. Induscoat then proposes shaped parts and tiles with IC BOND fixing chosen for the chemistry. The gas-side approach is on our page on pneumatic conveying, fans and ducts.