Cast iron surface treatment agent and treatment method

Abstract

The invention relates to a cast iron surface treatment agent and a treatment method. The cast iron surface treatment agent comprises titanium fluoride, zirconium nitrate, zirconium fluoride, amino silane, 1, 2-bis(triethoxysilyl) ethane and bis(triethoxysilyl) hexane, further comprises 10-50ppm free fluoride ions and has the PF value of 3.2-4.5. The treatment method comprises the following steps of arranging a cast iron material at a cathode of an electroplating device and electrolyzing the cast iron material in an anticorrosive agent.

Description

technical field [0001] The invention belongs to the field of metal surface treatment, and specifically refers to a treatment agent and a treatment method for anticorrosion treatment on the surface of cast iron materials. Background technique [0002] To improve the corrosion resistance of metal surfaces, metal surfaces are often treated with chromates or treated with phosphates. However, the waste water in the metal surface treatment process using chromate or phosphate has serious damage to the environment and the health of workers. With the increasing awareness of environmental protection in the world, the use of chromate or phosphate is now subject to strict restrictions. [0003] Although the harm to workers is relatively small in the process of metal surface treatment with phosphate, the problem of rich phosphating in the subsequent wastewater is serious, and the use of chromium-containing salts is inevitable in the process of using phosphate. Therefore, now Many count...

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Problems solved by technology

[0005] However, all chromate-free metal surface treatments or phosphate metal surface treatments in the prior art still cannot compare with the effect of using chromate or phosphate metal surface treatments, and there is also a difference in corrosion resistance, and the subsequent There is also a gap in the coating film adhesion