Acid Corrosion Inhibitor Compatible With VES 160℃

Advantages and Features

1. Specifically designed for acid diverting system, with minimal impact on the viscosity of the diversion agent.
2. Compatible with ZX-DA-01 series, providing excellent corrosion inhibition and viscosity maintenance at high temperatures up to 160°C/320°F.
3. Suitable for a wide range of steel types, including N80, CT80, QT800, P110, and P110S.
4. High flash point.
5. Long-lasting corrosion inhibition effect.

Preparation of Clean Self-Diverting Acid System

Formulation of the spent acid of clean Self-diverting system

Method 1:

Following the formula (20% hydrochloric acid + clean self-steering agent ZX-DA-01 + specialized steering acid corrosion inhibitor ZX-DA-02), add the respective chemicals into a 500 mL beaker in sequence to prepare the clean self-steering acid.

2) Pour 200g of the prepared clean self-steering acid into a 1000 mL beaker, gradually add 58g of calcium carbonate multiple times, stirring continuously with a glass rod. After the addition of calcium carbonate, stir to ensure full reaction until the pH reaches or exceeds 4, then allow to sit until degassing is complete.

Method 2:

Follow the formula (22% calcium chloride + clean self-steering agent ZX-DA-01 + specialized steering acid corrosion inhibitor ZX-DA-02) or (30% calcium chloride + clean self-steering agent ZX-DA-01 + specialized steering acid corrosion inhibitor ZX-DA-02), first dissolve the calcium chloride in water. Once fully dissolved, add the clean self-steering agent ZX-DA-01 and the specialized steering acid corrosion inhibitor ZX-DA-02 in sequence, stirring evenly with a glass rod.

Note: 22% calcium chloride is equivalent to 15% HCl spent acid, and 30% calcium chloride is equivalent to 20% HCl spent acid.

Viscosity Testing of Clean Self-Steering Acid Exhaust

Measure 38mL of clean self-steering acid exhaust and place it inside the cylinder of a MARS-III rheometer. Use the PZ38Ha testing rotor, with a warming speed of 3 °C/37.4 °F per minute to the required temperature, shear rate of 170 S-1. Once the temperature reaches the required level, continue isothermal shearing for 30 minutes.

Gel-breaking Methods, adjustable as required, gel-breaking viscosity <5mPa.s, measured with a capillary viscometer.

1) Add 1% of ethylene glycol monobutyl ether and stir evenly,the gel will be broken.

2) Add 70mL of colloid and 30mL of kerosene or diesel to a flask, stir evenly, and let sit at room temperature for 1 hour to break the gel.

3) Add 70mL of colloid and 30mL of kerosene or diesel to a flask, stir evenly, and a water bath at 90°C can break the gel.

Corrosion Rate of Clean Self-Steering Acid

The testing method is in accordance with SY/T 5405-2019. The steel specimen is N80, and the hydrochloric acid concentration is 20%.

Technical Indexes

Core Indexes

Packing

200L steel drum or 1000L IBC or per clients' request.

Storage

This series of acid corrosion inhibitor ZX-DA-02 can be stored in the warehouse, avoid sunshine directly.

Safety and handling