What is Acid Proof Brick Lining?
Acid proof brick lining protects the structural shell of a tank, duct, chamber or floor from chemical attack by separating it from the process fluid with a system of membrane, mortar bed and acid-resistant brick — not a single coat, but a built-up barrier.
Acid proof brick lining is the proven, long-lasting solution. And Chemicraft is Gujarat’s specialist acid proof brick lining service provider — with hands-on expertise across chemical plants, ETPs, pickling tanks, chimneys, and industrial floors.
How Acid Proof Brick Lining Protects Against Corrosion?
1. Physical Barrier Formation
The dense, low-porosity brick surface presents a chemically inert shield between the corrosive substance and the equipment surface. Unlike steel or concrete, the ceramic brick has no micro-pores or surface reactions that could initiate a corrosion chain.
2. Chemically Inert Surface Chemistry
Silica-rich ceramic bricks form a passivated silica layer under acid attack.
3. Mortar Joint Sealing
The acid-resistant mortar fills every joint between bricks with a chemically compatible binder. Furan resin mortar, for example, cures into a thermoset polymer that resists nearly all organic and inorganic acids. The mortar and brick act as a unified system with no weak links at the interfaces.
4. Membrane Redundancy
High-quality installations include an intermediate membrane — typically a flexible bituminous or epoxy coat — between the brick layer and the steel or concrete substrate. Even if a mortar joint develops a hairline crack over years of thermal cycling, the membrane prevents acid from ever reaching the structural base.
5. Thermal Stress Resistance
The ceramic layer moderates thermal gradients. Rapid temperature cycling causes differential expansion that stresses and cracks conventional coatings. The thermal mass of the brick layer reduces these stresses, keeping the system intact over decades
Material Used In Acid Proof Brick Lining
Acid Resistant Bricks: 38mm vs 75mm
| Parameter | 38mm Bricks | 75mm Bricks |
|---|---|---|
| Typical Use | Floors, light-duty tanks, tiles Heavy-duty tanks, vessels, chimneys | Floors, light-duty tanks, tiles Heavy-duty tanks, vessels, chimneys |
| Mechanical Load | Moderate (foot traffic, light forklifts) | High (heavy equipment, thermal shock) |
| Chemical Exposure | Similar in both | Similar in both |
| Thermal Protection | Moderate insulation | Moderate insulation Significantly higher thermal mass |
Acid Resistant Mortar
| Mortar Type | Chemical Resistance | Max Temp |
|---|---|---|
| K-silicate | Concentrated H₂SO₄, HCl, HNO₃ | 1000°C |
| CNSL | Acid/mild alkali | 170°C |
| Furan | Acid + strong/frequent alkali, or mixed unpredictable exposure | 170°C |
| Phenolic | non-oxidizing acids, dilute oxidizing acids, solvents, and neutral salts. | 170°C |
Procedure of Acid Proof Brick Lining
- Step 1: First surface is cleaned manual/mechanically
- Step 2: Surface is prepared with bitumen primer for adhesion
- Step 3: Acid resistant brick is laid with selected mortar with bedding 5-6mm and Pointing(Joint filling) 3-4mm.
- Step 4: Curing of Brick-Mortar system with suitable time period describe by the manufactural.
- Step 5: Check lining and voids to ensure proper sealing.
Gallery of Acid Proof Brick Lining
Application Area
- Floors and drainage systems – Used in industrial areas where chemical spillage is common.
- Acid storage tanks – Prevents direct contact between acids and the tank structure.
- Pickling tanks – Used where acids are employed for cleaning metal surfaces.
- Chimneys and stacks – Resists acidic gases and fumes generated during industrial operations.
- Effluent treatment plants (ETP) – Protects tanks and channels carrying acidic wastewater.
- Filter press and process equipment areas – Provides resistance against corrosive liquids and chemical leakage.
Industries We Serve
Frequently Asked Question (FAQs)
How long does acid proof brick lining last?
A properly installed acid proof brick lining system reliably lasts 15 to 30 years. Longevity depends on the chemical environment severity, temperature cycling frequency, and quality of the initial installation — particularly mortar joint consistency and membrane integrity.
Can existing corroded structures be lined?
Yes — in most cases. The surface must be structurally sound and properly prepared. Severely corroded areas may need patch repairs before lining proceeds. Chemicraft conducts surface assessment as the first step of every project.
What is the difference between acid proof tiles and acid proof bricks?
Both are dense vitrified ceramics, but bricks are 38mm to 75mm thick while tiles are 10mm to 20mm. Bricks are preferred where mechanical loads, thermal shock, or deep chemical penetration risk is higher. Tiles suit situations where space is limited and primary risk is chemical exposure without mechanical stress.