How to use steel bar rust remover?

1. Improper operation method of using steel bar rust remover to remove steel bar rust will cause the following situations:

1. The rust on the surface of the steel bar has no effect, no reaction or the effect is based on the surface It's not obvious that one piece is good, one piece is bad, and the effect is uneven.

2. The surface of the steel bars will turn white. The reason for whitening is the precipitation of zinc ions. There are two situations: 1. The whitening is serious and powder is produced. Use a high-pressure water gun to rinse it before use. 2. There is no powder produced or dust that cannot be touched by hand, and the soil can be mixed directly without treatment. Of course, there is also a type of inferior product that needs to be identified with caution.

3. The surface of the steel bar will turn red.

4. The effect will appear after a long time or even a few days.

2. Analysis of the reasons for improper use of steel rust remover:

Causes of whitening: 1. If it is not used as the original solution, mixing with water will cause whitening.

2. If water is seen before it is completely dry after spraying, it will turn white, which is equivalent to diluting it.

3. The surface is too dirty and has not been cleaned, causing it to turn white.

4. The rust is severe and the amount of spraying is not enough, causing the rust remover to be dirty and white.

The correct method of operation and use of steel bar rust remover:

1. Ensure that there is no contamination, dust or other dirt attached to the surface of the steel bar. Otherwise, it should be washed with a high-pressure water gun and allowed to dry to 80%. After drying, spray this steel bar rust remover. (If there is dirt attached and it is not rinsed, white ash will appear).

2. The steel bar rust remover needs to be used in original solution and cannot be mixed with water. (Otherwise white ash will affect the rust removal effect)

3. The steel bar rust remover must be sprayed evenly and thoroughly through the steel bars (a pesticide sprayer can be used for operational spraying). If the spray is uneven or not thorough, it will directly It affects the rust removal effect and may produce white ash.

4. After spraying the steel bar rust remover, make sure there is no water before the effect is achieved. Therefore, make sure it does not rain for one or two days after the construction. (You can check the weather forecast) The general reaction between steel bar rust remover and steel bars takes about 8 hours to take effect (because it does not contain strong acid or alkali, and it will also form anti-rust function, so the reaction time is slightly longer), and it will dry out after 24 hours. Concrete can be poured.

5. Because the temperature is too high in summer, spraying steel bar rust remover should be carried out before eight or nine o'clock in the morning or after four or five o'clock in the afternoon. If the temperature is too high at noon, spraying steel bar rust remover is prohibited. Otherwise, the rust removal effect will be affected.

6. When spraying steel bar rust remover, you should wear a mask and latex gloves to prevent the wind from blowing your eyes or skin and other places. If you accidentally come into contact with your skin, eyes, etc., you need to rinse with plenty of water.

7. If you don’t know how effective this steel bar rust remover is at the beginning, you can spray this steel bar rust remover in a small area to check the effect. The operation method is the same as (1-6). If the rust removal effect is ideal, it can be used on a large area.

8. If the tied steel bars have just rained, be sure to spread them out and wait until the steel bars are 80 to 90% dry before spraying steel bar rust remover.

Construction parameters of dosage

Bundled rebar 10 kg/ton (soaking and rust removal at 6-8 kg/ton);

Tied steel bars 12 kg/ton;

Pretreated rebar spraying is about 1 bundle/bucket, and the tied steel bars are 30-50 square meters/bucket (board bars or wall bars) (provided by China Construction 13th Bureau data).

The actual dosage is directly related to the rust removal process, the state of the steel bars, the degree of corrosion of the steel bars, the speed of construction and the amount of spraying.

Dezhou Dejian Construction Group provides data: 1 gate/more than 10 barrels of a residential building, 300-500 square meters are sprayed every day.

Scope of application: Mainly used for tied and bundled steel bars on construction sites with downtime between 1 and 6 months.