What is the difference between non-phosphorus and non-silicon corrosion inhibitors used in metal working fluids?

December 29, 2023

What is the difference between non-phosphorus and non-silicon corrosion inhibitors used in metal working fluids?

DMAE non-phosphorus non-silicon Corrosion Inhibitor product characteristics

1. Special ester lubricant

2. Good non-ferrous corrosion inhibition, especially suitable for aluminum alloy corrosion inhibition

3. Low foam, little foam trouble

4. Good lubrication performance, can reduce the amount of synthetic ester, polyether and other lubricants added in the formula

5. Compatible with cationic settler

6. Recommended for use in various systems of metal working fluids

7. It is recommended to add 2.0%-5.0% in the formula

Performance test

Single dose corrosion inhibition performance test

Test method: After grinding, ADC12 aluminum sheet was half-soaked in 1% MEA aqueous solution, and then DMAE was added gradually, and the corrosion of aluminum sheet was observed at room temperature.

By gradually adding DMAE, the corrosion of MEA to aluminum is gradually reduced

Corrosion inhibition in metal working fluids

According to the above reference formulations, DMAE was compared with the siloxanone corrosion inhibitors commonly used in the market, and the influence of boron compounds on the corrosion inhibition performance of DMAE was demonstrated. The formulations above were all transparent and uniform liquids.

Comparison of corrosion inhibition properties

Test method: The above test formula plan 1, Plan 2, Plan 3 and Plan 4 were prepared into 100ml 5% diluent (Shanghai resident tap water), and the ADC12 aluminum sheet was polished and half-soaked in an aqueous solution at 50 degrees and placed for 8 hours to observe the corrosion of the aluminum sheet

Conclusion: The competition between boric acid inorganic salts and DMAE results in the ineffectiveness of DMAE corrosion inhibition, which is comparable to that of siloxanone.

Lubrication performance test

Test method: Dilute the above reference formula scheme 1 and Scheme 3 into 10% diluent (Shanghai resident tap water), and compare the tapping torque lubrication performance.

Test tool: microtap tapping torque machine

Tapping depth: 12mm

Tapping aperture: M3 hole

Speed: 1200RPM

Tapping torque force: 400NCM

Material: AL7075

Conclusion: DMAE has positive synergistic effect on lubrication performance.

Tolerance of cationic settler

Test method: Dilute the above-mentioned reference formula scheme 2 and Scheme 4 into 10% diluent (Shanghai resident tap water), add 1% cationic settler D77 to the diluent, and store it at 70 degrees for 1 week to observe its stability. (Silane will self-polymerize into polymers under acidic or weakly alkaline conditions, resulting in crystallization, so siloxanones will be precipitated in large quantities in low-alkaline environments, or in the presence of cationic settlers.)

Conclusion: DMAE is completely compatible with cationic settler.

Product summary

DMAE has good corrosion inhibition properties, but it has competitive adsorption with some additives, which requires formulators to carefully adjust and mix DMAE in the formulation to have certain lubrication properties, and has a positive effect on lubrication DMAE can be compatible with cationic settler.

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