CN103087567B - A kind of inhibition Anti-corrosion metal surface silane protective agent for surface treatment and preparation method thereof - Google Patents

Abstract

The invention discloses a kind of inhibition Anti-corrosion metal surface silane protective agent for surface treatment, be made up of following component, in every 500 grams of mixed solutions, the weight (gram) of each component is: Ammonium benzoate 1-2, trolamine 1-2, methylcellulose gum 3-5, rosin 8-10, trihydroxyethyl isocyanuric ester 0.5-1.2, MALEIC ANHYDRIDE 10-12, butyl 4-6, Virahol 5-8, primary ammonium phosphate 0.5-1, urea 1-2, N-2-(aminoethyl)-3-aminopropyl trimethoxysilane 5-8, surplus be deionized water.The present invention adopts rosin as reaction raw materials, with the polymerizable raw material such as MALEIC ANHYDRIDE, silane, can form stronger protective membrane in metallic surface; Enhance the corrosion resistance nature of metallic matrix.

Description

A kind of inhibition Anti-corrosion metal surface silane protective agent for surface treatment and preparation method thereof

Technical field

The present invention relates to a kind of at metallic surface silanization treating agent and by its technique in metallic surface silanization process.

Background technology

Bonderizing is widely applied in coated metal pre-treatment, lubrication, the industry such as antirust.Particularly in Coating Pretreatment industry, bonderizing is one of the most frequently used pretreatment process.Bonderizing is the process forming biphosphate ammonium salt protective membrane after metal reacts in acid phosphatase ammonium dihydrogen salts solution on its surface.Phosphatize phosphate coat also has good oilness, and insulativity and solidity to corrosion, be thus widely used in the manufacture field of the products such as automobile, machinofacture, aerospace and household electrical appliance.Phosphorization treatment process is for main raw material with primary ammonium phosphate, zinc, manganese, nickel, cause the Heavy environmental pollution such as heavy metal, phosphorus, nitrite, and in treating processes, all more or less can produce sediment and obnoxious flavour, what impact was produced normally carries out, and the waste water COD of discharge and heavy metal will endanger environment if do not carried out environmental protection treatment; In addition, bonderizing major part need be carried out under the condition of heating, and energy consumption is comparatively large, complex process, and operation is also inconvenient.Existingly occurred silane surface treatment technology, but silane surface treatment agent is unstable in metallic surface film forming, antiseptic property is unstable, poor effect.

Summary of the invention

The object of this invention is to provide a kind of inhibition Anti-corrosion metal surface silane protective agent for surface treatment and preparation method thereof; this solution does not need to heat; not phosphorous, produce without sediment, not containing heavy metal, energy-conservation, simple and convenient management; can form stronger protective membrane on duralumin surface, anticorrosion ability is good.

Technical scheme of the present invention is as follows:

A kind of inhibition Anti-corrosion metal surface silane protective agent for surface treatment, it is characterized in that, be made up of following component, in every 500 grams of mixed solutions, the weight (gram) of each component is:

Ammonium benzoate 1-2, trolamine 1-2, methylcellulose gum 3-5, rosin 8-10, trihydroxyethyl isocyanuric ester 0.5-1.2, MALEIC ANHYDRIDE 10-12, butyl 4-6, Virahol 5-8, primary ammonium phosphate 0.5-1, urea 1-2, N-2-(aminoethyl)-3-aminopropyl trimethoxysilane 5-8, surplus be deionized water.

The preparation method of described metal surface silylation protection treating agent, is characterized in that comprising the following steps:

(1), by rosin heating melt, to 110-115 DEG C, add butyl, N-2-(aminoethyl)-3-aminopropyl trimethoxysilane, stirring reaction 35-50 minute;

(2), be warming up to 145-160 DEG C, add trihydroxyethyl isocyanuric ester, MALEIC ANHYDRIDE, stirring reaction 40-50 minute;

(3), continue to be warming up to 190-205 DEG C, add trolamine, primary ammonium phosphate, stirring reaction 40-50 minute;

(4), be cooled to 80-90 DEG C, add other material, stir, insulation reaction 1-2 hour, after cooling, adjust PH to be neutral.

Silane surface treatment agent of the present invention, first metallic matrix directly can be entered in treatment agent of the present invention after degreasing, washing and process, after process, metal base surface can obtain one deck coating, then can carry out washing or do not wash lower one technique-oven dry according to process requirements, the operations such as powder spraying can be carried out after oven dry, be: working temperature: room temperature 25 DEG C that pure water washes specific conductivity < 20 μ s/cm at the processing parameter for the treatment of processes, the treatment time: 90-250 second.

Compared to the prior art the present invention, has the following advantages:

(1) the present invention adopts rosin as reaction raw materials, with the polymerizable raw material such as MALEIC ANHYDRIDE, silane, can form stronger protective membrane in metallic surface; Enhance the corrosion resistance nature of metallic matrix.

(2) contain inhibiter in raw material, increase the anticorrosion ability of protective membrane.

(3), formed protective film dense uniform, polarized current density is less.

(4) thickness (< 150nm) is protected to be significantly less than traditional phosphating solutions film (10 ~ 15 μm).

Embodiment

A kind of inhibition Anti-corrosion metal surface silane protective agent for surface treatment, be made up of following component, in every 500 grams of mixed solutions, the weight (gram) of each feed composition is:

Ammonium benzoate 2, trolamine 1, methylcellulose gum 3, rosin 10, trihydroxyethyl isocyanuric ester 1.2, MALEIC ANHYDRIDE 10, butyl 4, Virahol 5, primary ammonium phosphate 1, urea 2, N-2-(aminoethyl)-3-aminopropyl trimethoxysilane 5, surplus be deionized water.

The preparation method of described metal surface silylation protection treating agent, comprises the following steps:

(1), by rosin heating melt, to 110-115 DEG C, add butyl, N-2-(aminoethyl)-3-aminopropyl trimethoxysilane, stirring reaction 35-50 minute;

(2), be warming up to 145-160 DEG C, add trihydroxyethyl isocyanuric ester, MALEIC ANHYDRIDE, stirring reaction 40-50 minute;

(3), continue to be warming up to 190-205 DEG C, add trolamine, primary ammonium phosphate, stirring reaction 40-50 minute;

(4), be cooled to 80-90 DEG C, add other material, stir, insulation reaction 1-2 hour, after cooling, adjust PH to be neutral.

First steel plate galvanized directly can be entered in treatment agent of the present invention after degreasing, washing and process, after process, matrix surface can obtain one deck coating, then can carry out washing or do not wash lower one technique-oven dry according to process requirements, the operations such as powder spraying can be carried out after oven dry, at the processing parameter for the treatment of processes be: working temperature: room temperature 25 DEG C, pure water washes specific conductivity < 20 μ s/cm, the treatment time: 90-250 second.

Steel plate galvanized first adopts alkali-free degreasing fluid to carry out washing and removes oil stain, then puts into silane surface treatment agent of the present invention and process, and after oven dry, carries out immersion test, adopts the NaCl aqueous solution of 0.1M, observe sample surfaces situation; Testing impedance carries out in 3.5 (wt) %NaCl aqueous solution.Not there is red rust in 9 days in steel plate galvanized, detection coating and steel plate galvanized cohesive strength are 9.1Mpa, ︱ Z ︳ 10mHz value is 6.7E7.

Claims (1)

1. an inhibition Anti-corrosion metal surface silane protective agent for surface treatment, is characterized in that, be made up of following component, and in every 500 grams of mixed solutions, the weight of each component is count in grams:

Ammonium benzoate 1-2, trolamine 1-2, methylcellulose gum 3-5, rosin 8-10, trihydroxyethyl isocyanuric ester 0.5-1.2, MALEIC ANHYDRIDE 10-12, butyl 4-6, Virahol 5-8, primary ammonium phosphate 0.5-1, urea 1-2, N-2-aminoethyl-3-aminopropyl trimethoxysilane 5-8, surplus are deionized water;

The preparation method of described inhibition Anti-corrosion metal surface silane protective agent for surface treatment, comprises the following steps:

(1), by rosin heating melt, to 110-115 DEG C, add butyl, N-2-aminoethyl-3-aminopropyl trimethoxysilane, stirring reaction 35-50 minute;

(2), be warming up to 145-160 DEG C, add trihydroxyethyl isocyanuric ester, MALEIC ANHYDRIDE, stirring reaction 40-50 minute;

(3), continue to be warming up to 190-205 DEG C, add trolamine, primary ammonium phosphate, stirring reaction 40-50 minute;

(4), be cooled to 80-90 DEG C, add other material, stir, insulation reaction 1-2 hour, after cooling, adjust pH to be neutral.