Core Application of EDTP in Metal Surface Cleaning

Specific Application Scenarios (By Metal Type + Cleaning Purpose)

1. General Cleaning of Steel Workpieces (Degreasing + Removing Floating Rust)

• Core functions: Chelates calcium and magnesium ions in water to avoid hard water interference, captures iron ions on the steel surface to prevent secondary rust, and enhances the emulsifying power of degreasers.
• Formula key points: EDTP 1%-3% + Fatty Alcohol Polyoxyethylene Ether (AEO-9) 2%-5% + Sodium Hydroxide 0.5%-1.5% + Balance water, pH controlled at 9-11.
• Operating conditions: Temperature 40-60℃, immersion for 10-20 minutes or spray for 3-5 minutes, followed by rinsing with clean water 1-2 times.
• Application scenarios: Oil stains after mechanical processing, floating rust on stamping parts, and pre-treatment cleaning of hardware.

2. Cleaning of Non-Ferrous Metals such as Aluminum/Copper (Low-Corrosion Descaling)

• Core functions: Mildly chelates oxide layers (aluminum oxide, copper oxide) on the metal surface, avoids corrosion of the base material by strong acids and alkalis, and inhibits metal discoloration during cleaning.
• Formula key points: EDTP 2%-4% + Sodium Dihydrogen Phosphate 1%-2% + Non-ionic Surfactant 1%-3% + Balance water, pH controlled at 6.5-8.5.
• Operating conditions: Temperature 30-50℃, ultrasonic cleaning for 5-10 minutes, air-drying naturally after rinsing.
• Application scenarios: Precision cleaning of aluminum alloy parts, copper pipelines, and electronic component pins.

3. Pre-Treatment Cleaning of Metal Surfaces (Before Coating/Electroplating)

• Core functions: Completely removes oil stains, oxide scales, and metal impurities on the metal surface, improves the adhesion of subsequent coatings or platings, and prevents coating peeling.
• Formula key points: EDTP 3%-5% + Sodium Tripolyphosphate 2%-3% + Cocamidopropyl Betaine 1%-2% + Balance water, pH controlled at 10-12.
• Operating conditions: Temperature 50-70℃, immersion for 20-30 minutes, drying after rinsing (temperature 80-100℃, time 10 minutes).
• Application scenarios: Pre-treatment cleaning of auto parts, home appliance casings, and hardware accessories before coating/electroplating.

4. Online Cleaning of Metal Equipment (Descaling of Pipes/Molds)

• Core functions: Dissolves scale (calcium carbonate, iron hydroxide) and oil deposits on the inner wall of metal equipment without damaging the base material, and the cleaning solution is easy to discharge.
• Formula key points: EDTP 4%-6% + Citric Acid 1%-2% + Corrosion Inhibitor (e.g., Benzotriazole) 0.1%-0.3% + Balance water, pH controlled at 5-7.
• Operating conditions: Temperature 60-80℃, circulating cleaning for 30-60 minutes, followed by reverse rinsing with clean water until the effluent pH is neutral.
• Application scenarios: Online descaling cleaning of metal pipes, injection molds, and heat exchangers.

Product details:

EDTP(Q75)N,N,N'N'-tetra(2-hydropropyl)ethylene diamine（102-60-3）

CAS:102-60-3

Trade name EDTP (Q75)

Chemical name N,N,N’N’-tetra(2-hydropropyl)ethylene diamine

Molecular formula C14H32N2O4

Assay 75%

Appearance Colorless and transparent liquid

PH value 7.5-8.5

Wuhan Bright Chemical CO.,LTD

Contact: Emily Chen

Email: emilychen@brightchemical.com.cn

wechat/whatsapp:+86 13006369714