What are the criteria for choosing aluminum degreasers?

The degreaser should not contain inorganic substances as much as possible, especially sodium nitrite, sodium silicate, sodium metasilicate, caustic soda, sodium fluoride, sodium chloride, chromium-containing oxidants and other inorganic substances.

Such as non-ferrous metal cleaning agents, neutral degreasers, etc.

How to choose the anti-corrosion treatment agent after degreasing

Because aluminum is a soft material, it is not easy to remove the oil stains immersed in the aluminum material with a degreasing process, so the anti-corrosion treatment of aluminum should use a passivator or oxidant with the function of degreasing to completely remove the oil stains while forming a colorless passivation film.

Such as aluminum degreasing passivator, chromium-free degreasing oxidizer, etc.
  What are the standards for aluminum anti-corrosion passivation treatment agents?

(1) It has the function of degreasing oil.

(2) It is an environmentally friendly product, and it must not contain chromium ions (including trivalent chromium) nor other heavy metals and strong oxidants, such as nickel, copper, lead, nitric acid, etc.

(3) Organic corrosion inhibitors that affect the binding force cannot be used for corrosion prevention, such as silicate, sodium benzoate, sodium nitrite, emulsified wax, emulsified oil, etc.

(4) The film layer after passivation is a colorless transparent film, and there should be no white rust or black rust spots on the surface of the aluminum for the required time.

(5) Acidic substances that react violently with aluminum, such as fluoride, should not be selected.

As long as the above conditions are met, any chemical solution can be used, and it is best to choose environmentally friendly, low-cost, room temperature treatment chemical solution, and you can choose qualified products for testing and screening through online inquiries.