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Process for phosphating highway guardrails by adopting room-temperature multi-functional phosphating liquid

A technology of highway and phosphating solution, which is applied in the coating process of metal materials, etc., can solve the problems of low efficiency and high cost, and achieve the effects of simplifying procedures, saving energy and saving procedures

Inactive Publication Date: 2014-12-31
WUXI LUOSHE TECH VENTURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the cost is large and the efficiency is low

Method used

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Examples

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Comparison scheme
Effect test

Embodiment 1

[0012] A process for phosphating highway guardrails using a multifunctional phosphating solution at room temperature. The phosphating solution used in the process consists of: 85% phosphoric acid 135g / L, zinc oxide 45g / L, magnesium oxide 30g / L, hypophosphorous acid Calcium 24g / L, Triethanolamine 8g / L, Sodium Nitrite 5g / L, Sodium Fluoride 5g / L, Sodium Chlorate 4g / L, Citric Acid 2.5g / L, Ammonium Molybdate 2.5g / L, Pingpingjia 5g / L, OP-10 7.5g / L, and the balance is water; the process is: prepare a phosphating solution according to the above components, adjust the pH value to 3.0 with ammonium acetate, make the temperature 40°C, and then prepare the The highway guardrail blanks are put into it, and a stirrer is set in the phosphating tank to make the phosphating solution flow. The phosphating treatment time is controlled to be 20 minutes, and then it is taken out and dried in the air.

Embodiment 2

[0014] A process for phosphating highway guardrails using a multifunctional phosphating solution at room temperature. The phosphating solution used in the process consists of: 85% phosphoric acid 145g / L, zinc oxide 35g / L, magnesium oxide 40g / L, hypophosphorous acid Calcium 20g / L, triethanolamine 12g / L, sodium nitrite 3g / L, sodium fluoride 7g / L, sodium chlorate 2g / L, citric acid 3.5g / L, ammonium molybdate 1.5g / L, Pingping 7g / L, OP-10 6.5g / L, and the balance is water; the process is: prepare a phosphating solution according to the above components, adjust the pH value to 4.0 with ammonium acetate, and make the temperature 15°C, and then prepare the Put the blank parts of the highway guardrail into it, set a stirrer in the phosphating tank to make the phosphating solution flow, control the phosphating treatment time for 30 minutes, and then take it out and dry it.

Embodiment 3

[0016] A process for phosphating highway guardrails using a multifunctional phosphating solution at room temperature. The phosphating solution used in the process consists of: 85% phosphoric acid 140g / L, zinc oxide 40g / L, magnesium oxide 35g / L, hypophosphorous acid Calcium 22g / L, triethanolamine 10g / L, sodium nitrite 4g / L, sodium fluoride 6g / L, sodium chlorate 3g / L, citric acid 3.0g / L, ammonium molybdate 2.0g / L, Pingping 6g / L, OP-10 7.0g / L, and the balance is water; the process is as follows: prepare a phosphating solution according to the above components, adjust the pH value to 3.5 with ammonium acetate, make the temperature 28°C, and then prepare the Put the blank parts of the highway guardrail into it, set a stirrer in the phosphating tank to make the phosphating solution flow, control the phosphating treatment time for 25 minutes, then take it out and dry it.

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Abstract

The invention discloses a process for phosphating highway guardrails by adopting a room-temperature multi-functional phosphating liquid. The phosphating liquid adopted in the process comprises the composition: 135-145 g / L of a 85% phosphoric acid, 35-45 g / L of zinc oxide, 30-40 g / L of magnesium oxide, 20-24 g / L of calcium hypophosphite, 8-12 g / L of triethanolamine, 3-5 g / L of sodium nitrite, 5-7 g / L of sodium fluoride, 2-4 g / L of sodium chlorate, 2.5-3.5 g / L of citric acid, 1.5-2.5 g / L of ammonium molybdate, 5-7 g / L of peregal, 6.5-7.5 g / L of OP-10, and the balance water. The process comprises the steps: preparing the phosphating liquid, adjusting the pH value to 3.0-4.0 by ammonium acetate, making the temperature be 15-40 DEG C, then placing highway guardrail blank pieces into the phosphating liquid, arranging a stirrer in a phosphating tank to make the phosphating liquid flowing, controlling the phosphating processing time to be 20-30 minutes, taking out, and then air-drying.

Description

technical field [0001] The invention relates to the technical field of surface treatment, in particular to a process for phosphating expressway guardrails by using a normal-temperature multifunctional phosphating solution. Background technique [0002] The traditional phosphating process is to wash the oil and rust (scale) on the metal surface with alkali, pickle, and neutralize before phosphating, and then perform phosphating on the metal substrate. Phosphating is the process of forming a layer of chemical conversion film on the metal surface. This layer of phosphating film mainly plays the role of anti-rust and primer, and can significantly improve the adhesion and corrosion resistance of the paint film. At present, medium temperature (45-80°C) and low temperature (30-40°C) phosphating are the most widely used phosphating processes. Chinese patents CN1057681A and CN1066894A respectively report room temperature (12-35°C) phosphating solutions, but these phosphorus When the...

Claims

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Application Information

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IPC IPC(8): C23C22/44
Inventor 高忠清
Owner WUXI LUOSHE TECH VENTURE
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