Foundry chemicals are the backbone of every high-quality metal casting operation. Whether you are producing aluminium alloy components for the automobile sector or manufacturing precision parts for aerospace, the right foundry chemical determines the final quality of your casting. Saru Aikoh Chemicals Pvt. Ltd. has been delivering trusted, high-performance foundry chemical solutions across India since 1973 — helping foundries reduce defects, improve output, and stay competitive.
What Are Foundry Chemicals and Why Do They Matter?
Foundry chemicals are specialized substances used during metal casting to control melt quality, improve mold performance, enhance surface finish, and reduce casting defects. They are applied at various stages — from melting and treatment to pouring and demolding.
Without the right chemicals, foundries face problems like porosity, shrinkage, inclusions, poor surface finish, and higher rejection rates. Using the correct product at the right stage directly lowers production costs and improves part quality.
Key benefits of using quality foundry chemicals include:
- Better casting surface finish
- Reduced metal rejections and scrap
- Improved melt cleanliness
- Higher dimensional accuracy
- Longer mold and die life
- Lower energy and material waste
To explore how these chemicals are applied across different industries, visit the Saru Aikoh application solutions page.
Complete List of Foundry Chemicals Used in Modern Casting
Modern foundry operations rely on a wide range of specialized chemical products. Here is a structured list of foundry chemicals commonly used today:
| Chemical Type | Primary Function | Common Application |
|---|---|---|
| Fluxes (Cover & Modifier) | Clean melt, modify microstructure | Aluminium, copper casting |
| Degassing Tablets | Remove dissolved hydrogen gas | Aluminium alloy casting |
| Grain Refiners | Refine grain structure for strength | Non-ferrous metal processing |
| Modifiers | Modify silicon structure in alloys | Aluminium-silicon alloys |
| Die Coatings | Protect die surface, control flow | GDC and PDC die casting |
| Release Agents / Lubricants | Enable clean part ejection | Gravity & pressure die casting |
| CA Remover / Mg Remover | Remove dissolved calcium/magnesium | Aluminium melt treatment |
You can find more Indian foundry chemical suppliers and compare options at IndiaMART’s foundry chemicals directory.
Fluxes – The Foundation of Melt Treatment
Fluxes are among the most widely used foundry chemicals. They clean the melt surface, remove oxides and non-metallic inclusions, and can also modify the metal’s microstructure to improve mechanical properties.
Saru Aikoh manufactures fluxes in two forms to match different foundry requirements:
Powder Form
Powder fluxes are easy to apply directly to the melt surface or inject into molten metal. They are ideal for batch-type furnaces and smaller casting operations. Their fine particle size ensures faster and more uniform reaction with oxides and impurities.
Granular Form
Granular fluxes are preferred for larger furnaces and continuous casting operations. Their coarser form reduces dust and improves handling safety on the shop floor. They dissolve steadily and provide more controlled treatment over a longer melt period.
Modifier Flux – Improving Alloy Microstructure
A Modifier Flux is a specific type of foundry flux designed to modify the morphology of silicon particles in aluminium-silicon alloys. Untreated alloys have coarse, plate-like silicon structures that reduce ductility and impact strength.
By applying Saru Aikoh’s Modifier Flux, the silicon transforms into a fine, fibrous structure — significantly improving elongation, toughness, and fatigue resistance. This is critical for automotive components like pistons, wheels, and engine blocks that undergo heavy mechanical stress.
Grain Refiner – Stronger, Finer Castings
A Grain Refiner is added to molten metal to produce a fine and uniform grain structure during solidification. Fine grains mean better mechanical properties — higher tensile strength, improved machinability, and reduced hot tearing during casting.
Saru Aikoh’s grain refiners are available in rod and waffle forms for easy addition to the melt. They are widely used in the aluminium casting industry to improve consistency across large production batches.
Key advantages include:
- Uniform grain structure throughout the casting
- Reduced hot cracking and shrinkage
- Better response to heat treatment
- Improved surface finish after machining
Degasser – Eliminating Gas Porosity
Gas porosity is one of the most common defects in aluminium castings. It is caused by dissolved hydrogen gas in the molten aluminium, which escapes as bubbles during solidification — leaving voids inside the casting.
A Degasser is a chemical tablet or block added to the melt to purge this dissolved hydrogen. As the degassing agent reacts, it releases an inert gas that rises through the melt, capturing hydrogen bubbles and carrying them to the surface.
Saru Degasser
Saru Aikoh’s proprietary Saru Degasser is formulated for highly efficient hydrogen removal with minimal dross formation. It is available in tablet form for easy, safe, and precise dosing. Foundries using Saru Degasser report significant reductions in porosity-related rejections and improved X-ray quality of castings.
Benefits of Saru Degasser:
- Fast and complete degassing reaction
- Low fume and smoke generation
- Compatible with all standard aluminium alloys
- Consistent tablet weight for precise dosing
Mg Remover – Remove Dissolved Magnesium
When magnesium content in molten aluminium exceeds the specification limit, it causes brittleness and poor casting quality. This is a common issue when recycled or secondary aluminium is used.
Remove Dissolved Magnesium Effectively
Saru Aikoh’s Mg Remover is specifically designed to selectively remove excess dissolved magnesium from aluminium melts without affecting other alloying elements. It reacts with magnesium to form stable compounds that are skimmed off as dross.
Available in Multiple Forms
The Mg Remover is available in both powder and granular form, making it adaptable to different furnace types and batch sizes. This flexibility reduces changeover time and operational complexity.
Consistent Quality
Each batch of Saru Aikoh’s Mg Remover undergoes quality testing to ensure consistent chemical composition and reactivity. This guarantees predictable results every time, reducing the need for multiple treatments.
CA Remover – Remove Dissolved Calcium
Calcium contamination in aluminium melts is another frequent challenge for secondary aluminium producers. Even trace levels of calcium can cause oxide inclusions, poor fluidity, and rough casting surfaces.
Remove Dissolved Calcium from the Melt
Saru Aikoh’s CA Remover targets and neutralizes dissolved calcium in the melt through a controlled chemical reaction, converting it into easily removable slag. This results in a cleaner melt and better casting integrity.
Available in Powder Form
The CA Remover comes in powder form for quick and even distribution across the melt surface. The fine particle size maximizes contact area and ensures a fast, complete reaction even in large-volume furnaces.
Consistent Quality
Like all Saru Aikoh products, the CA Remover is manufactured under strict quality control to deliver batch-to-batch consistency. Foundries can rely on it to meet tight chemistry specifications without repeated treatments or additional cost.
Explore all application areas and product uses at the Saru Aikoh applications page.
Die Coating – Protecting the Die and Improving Flow
Die casting operations — both Gravity Die Casting (GDC) and Pressure Die Casting (PDC) — require proper die surface preparation before every pour. Die coatings serve as a protective and functional barrier between the molten metal and the metal die.
Die Coating for GDC/PDC
Saru Aikoh manufactures precision die coatings specifically engineered for both GDC and PDC processes. These coatings control the heat transfer rate between the melt and the die, improve metal flow, prevent soldering (metal sticking to die), and protect the die surface from thermal fatigue.
Special Coating
For specialized applications — such as complex geometries, thin-wall castings, or high-temperature alloys — Saru Aikoh offers special purpose coatings that go beyond standard performance. These coatings are water-based, environmentally safe, and designed to meet the most demanding foundry specifications.
Key features of Saru Aikoh die coatings:
- Excellent thermal insulation and conductivity control
- Prevents metal penetration and die erosion
- Improves surface finish of the casting
- Water-based and low environmental impact
- Easy application by spray, brush, or dip
Die Releasing Agents – Clean Ejection Every Time
After a casting solidifies, it must be cleanly ejected from the die without sticking, tearing, or damaging the die surface. This is the job of Die Releasing Agents.
Release Agents and Lubricants
Saru Aikoh’s range of Release Agents and Lubricants is formulated for both GDC and PDC applications. They create a thin, uniform film on the die surface that prevents adhesion, reduces ejection force, and extends die life.
These products are designed for:
- Aluminium, zinc, and magnesium die casting
- High-speed production environments
- Both manual and automated spray systems
- Consistent release without residue buildup
Using the right release agent not only improves cycle time but also significantly extends die life — one of the biggest cost factors in any die casting operation.
Why Choose Saru Aikoh Chemicals as Your Foundry Chemicals Manufacturer in India?
When it comes to foundry chemicals manufacturers in India, Saru Aikoh Chemicals Pvt. Ltd. stands in a category of its own. Founded in 1973 through a joint collaboration with Aikoh Co. Ltd., Japan, the company brings over five decades of technical expertise and innovation to the Indian foundry sector.
| Factor | Local/Generic Suppliers | Saru Aikoh Chemicals |
|---|---|---|
| Product Range | Limited | Complete foundry solution portfolio |
| Technical Support | Minimal | Dedicated application engineering team |
| Quality Consistency | Variable batch-to-batch | Strict QC at every batch |
| Customization | Standard products only | Customized formulations available |
| Industry Experience | Limited | 50+ years with Japanese technology |
| Supply Network | Regional | Pan-India distribution |
From automobile OEMs to railway component manufacturers, Saru Aikoh serves foundries across ferrous and non-ferrous sectors. Their products cover every stage of the casting process — from melt treatment to final demolding.
Learn more about their complete solutions at Saru Aikoh Chemicals – Best Foundry Chemicals Manufacturers in India.
Top Use Cases: Where Foundry Chemicals Make a Difference
Foundry chemicals are not just for large-scale operations. They are critical across a wide range of industrial applications:
- Automotive Industry: Aluminium pistons, engine blocks, wheels, gearbox housings
- Aerospace Components: Lightweight structural castings requiring zero porosity
- Railway Parts: High-strength castings for bogies, axle boxes, and brackets
- Electrical Equipment: Transformer housings, motor end-shields
- Industrial Machinery: Pump casings, valve bodies, impellers
- Construction Equipment: Heavy-duty structural castings and fittings
Across all these sectors, using the right foundry chemical at the right process stage is the difference between a high-quality casting and a costly rejection.
How to Select the Right Foundry Chemical for Your Process
Choosing the correct foundry chemical requires understanding your specific process, alloy, and quality requirements. Follow this step-by-step approach:
- Identify your alloy: Aluminium, iron, copper, zinc — each has different chemical requirements.
- Assess your casting process: GDC, PDC, sand casting, or investment casting — each needs different products.
- Identify the defect you want to eliminate: Porosity, shrinkage, inclusions, sticking — each points to a specific solution.
- Check your furnace type and capacity: This determines product form (powder vs. granular vs. tablet).
- Contact a technical expert: Partner with a manufacturer like Saru Aikoh who can recommend application-specific products.
For personalized product recommendations based on your foundry setup, connect with Saru Aikoh’s technical team here.
