Metal Treatment - Sherlock Chemical

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Metal Treatment & Surface Finishing

Supplementary Technical Materials

1. Industry Overview

The metal treatment industry relies on advanced chemical chelating agents to ensure surfaces are clean, corrosion-free, and ready for coating or plating. Phosphonates like HEDP and ATMP, along with polyphosphates like SHMP, are essential for sequestering metal ions, removing oxides, and providing long-term corrosion inhibition in metal cleaning and electroplating baths.

2. Industry Pain Points

Metal processors frequently encounter technical challenges that compromise final product quality:

Application

Scale Formation in Baths: High water hardness leads to mineral scale buildup on equipment and metal parts, resulting in uneven surface finishes.
Rapid Corrosion: Freshly cleaned metal surfaces are highly reactive and prone to
Poor Chemical Stability: Many chelating agents decompose under the high-temperature and high-alkaline conditions required for industrial metal cleaning.
Impurities in Plating: Trace heavy metals in low-purity chemicals can contaminate electroplating baths, causing brittleness or poor adhesion of the plated layer.

3. Our Solutions

As a direct manufacturer, we provide high-purity chemicals engineered for precision surface engineering:

Superior Sequestration

Our HEDP and SHMP effectively lock away calcium, magnesium, and iron ions, preventing scale and ensuring a pristine metal surface.

High-Temperature Stability

Our HEDP is specifically designed to remain active in boiling cleaning baths and high-pH environments without breaking down.

Multi-Metal Protection

We offer ATMP and HEDP combinations that act as powerful cathodic corrosion inhibitors, protecting steel, aluminum, and copper during the treatment cycle.

Thermal-Process Purity

We utilize ultra-pure raw materials to ensure our phosphates and phosphonates have minimal heavy metal impurities, protecting the integrity of sensitive plating baths.

4. Recommended Product Matrix

Product	Function	Technical Edge	Typical Application
HEDP	Scale & Corrosion Inhibitor	Excellent stability at high pH and high temperature.	Metal degreasing, oxide removal, boiler cleaning.
ATMP	Sequestrant & Antiscalant	Exceptional calcium carbonate scale inhibition.	Industrial water cooling, metal surface pre-treatment.
SHMP	Chelating Agent	Powerful metal ion binding; prevents equipment scaling.	Metal cleaning solutions, industrial bottle washing.

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Sodium Hexametaphosphate (SHMP)

5. Technical Materials

A. Corrosion Inhibition Performance

Visualize how HEDP forms a stable protective film on metal surfaces to prevent oxidation.

B. Thermal Stability Curve

Data showing the active concentration of HEDP remaining stable at temperatures up to 200°C.

C. Chelation Capacity Benchmarks

A comparison of the sequestration power (mg of $CaCO_3$ per gram) for HEDP, ATMP, and SHMP.

D. Process Flow: Metal Surface Pre-treatment

A schematic showing where to apply chelating agents during the degreasing, pickling, and neutralizing stages.

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