CN103254871A - Compound corrosion inhibitor for chlorine salt-type snow-melting agent and application of compound corrosion inhibitor - Google Patents

Abstract

The invention discloses a compound corrosion inhibitor for a chlorine salt-type snow-melting agent and an application of the compound corrosion inhibitor. The compound corrosion inhibitor comprises the following materials in parts by mass: 12-35 parts of sodium hexametaphosphate, 8-20 parts of sodium silicate, 5-20 parts of zinc dihydrogen phosphate, 5-12 parts of sodium dodecyl benzene sulfonate, 5-20 parts of sodium tartrate, 4-12 parts of hexamethylene tetramine, and 6-13 parts of allyl thiourea, wherein the compound corrosion inhibitor is obtained by uniformly mixing the materials in the proportioning ratio. The prepared compound corrosion inhibitor can be bagged and sold by being uniformly mixed with chlorine salt in a ratio of (0.5 to 8): 100 of parts by mass. The compound corrosion inhibitor disclosed by the invention is a special corrosion inhibitor aiming at the chlorine salt-type snow-melting agent, has an obvious slow-release effect on the metals, such as roads, bridges and ancillary facilities and then achieves a good slow-release effect via the co-action of the seven materials.

Description

Composite corrosion inhibitor and the application thereof of villaumite type Snow Agent

Technical field

The present invention relates to a kind of composite corrosion inhibitor and application thereof of villaumite type Snow Agent.

Background technology

Snowing winter is " formidable enemy " of China's communications and transportation, and it is unobstructed with transportation to have a strong impact on Road safety, so people study the technology of road deicing snow melt.Wherein adopting Snow Agent is application method the most widely.Snow Agent is mainly used in places such as airport, highway, railway, avenue, plays deicing snow melt effect.Snow Agent has numerous species, mainly is villaumite type and non-villaumite type.Non-chloride salt Snow Agent is because the cost height is used less now.And the chloride salt Snow Agent is effective because of its snow melt, low price, is widely used in the snow-removing and ice-thawing of road always.Up to the present, the chloride salt Snow Agent is still main body.The early stage sodium-chlor that uses also used calcium chloride, magnesium chloride, Repone K or their mixture afterwards.

The chloride salt Snow Agent is one " double-edged sword ", it is when thawing ice and snow, can bring huge negative harm, be mainly reflected in its corrodibility (to Infrastructure, bridge, road, parking lot, underground utilities etc.), freeze-thaw damage (to concrete etc.).The villaumite Snow Agent is very serious to the corrosion of the metal (as carbon steel) of road both sides and bridge, the safe handling of harm bridge, and financial loss is huge.The inhibiter of chloride salt Snow Agent mostly is and is one-component at present, and corrosion inhibiting ability is limited.

Summary of the invention

The purpose of this invention is to provide a kind of inhibiter at the chloride salt Snow Agent, reduce in the use of chloride salt Snow Agent the corrosion to road, bridge and affiliated facility etc.

The material of the composite corrosion inhibitor of villaumite type Snow Agent is formed, and mass fraction is:

Sodium hexametaphosphate 99 12-35;

Water glass 8-20;

Primary zinc phosphate 5-20;

Sodium dodecylbenzene sulfonate 5-12;

Sodium tartrate 5-20;

Vulkacit H 4-12;

Propenyl thiocarbamide 6-13;

Mix by said ratio and to be composite corrosion inhibitor.

The application of inhibiter: the above-mentioned composite corrosion inhibitor that makes and villaumite mix by mass fraction 0.5-8:100 can pack sale.

The present invention has following characteristics:

Sodium hexametaphosphate 99 can significantly improve the anodic polarization degree of metal level, makes the metal anode corrosion process be subjected to obvious retardance.Water glass can form passive film in the metallic surface, and then the protection metal is avoided corrosion.Primary zinc phosphate and Sodium hexametaphosphate 99, water glass synergy improve corrosion mitigating effect.Sodium dodecylbenzene sulfonate, sodium tartrate, vulkacit H, propenyl thiocarbamide because the polar group of their electron donors and metal surface coordination network and, form chemisorbed layer, make metal surface form double electrical layers, nonpolar group then aligns, form hydrophobic layer, thereby corrosion reaction is suppressed.By the synergy of above-mentioned 7 kinds of materials, and then reach desirable corrosion mitigating effect.

1. The present invention be directed to the special corrosion agent of chloride salt Snow Agent, metals such as road, bridge and affiliated facility are had tangible slow release effect.

2. this inhibiter is Sodium hexametaphosphate 99, water glass, and primary zinc phosphate, Sodium dodecylbenzene sulfonate, sodium tartrate, vulkacit H, the composite mixture of propenyl thiocarbamide by the synergy of 7 kinds of materials, and then reaches corrosion mitigating effect preferably.

3. preparation process is simple, and each component gets final product after directly mixing after than weighing according to quality.

Embodiment

Embodiment 1:

Accurately take by weighing Sodium hexametaphosphate 99 10 grams respectively, water glass 6 grams, primary zinc phosphate 6 grams, Sodium dodecylbenzene sulfonate 4 grams, sodium tartrate 8 grams, vulkacit H 5 grams, propenyl thiocarbamide thiocarbamide 3.5 grams are they even mixing for standby use.

Embodiment 2:

Accurately take by weighing Sodium hexametaphosphate 99 15 grams respectively, water glass 8 grams, primary zinc phosphate 5 grams, Sodium dodecylbenzene sulfonate 4 grams, sodium tartrate 10 grams, vulkacit H 5 grams, propenyl thiocarbamide thiocarbamide 5.5 grams are they even mixing for standby use.

Embodiment 3:

Accurately take by weighing Sodium hexametaphosphate 99 18 grams respectively, water glass 9 grams, primary zinc phosphate 12 grams, Sodium dodecylbenzene sulfonate 8 grams, sodium tartrate 8.5 grams, vulkacit H 6.5 grams, propenyl thiocarbamide thiocarbamide 9 grams are they even mixing for standby use.

The inhibiter that routine 1-example 3 is made carries out corrosion test according to the Chinese Industrial Standards (CIS) of GB10124-88

(1) earlier be that 4 tinsel concentration of 2 millimeters are 5% sulphuric acid soln immersion 2 minutes with centre punching and aperture.Remove plated film, wash fast successively-alcohol flushing-acetone rinsing, nitrogen blowing is carried out drying, is placed on afterwards in the moisture eliminator, is numbered one by one, measures, weighs;

(2) obtain solution: the pure water that in 4 2000 ml beakers, adds 1000 milliliters respectively, in 4 beakers, all add sodium-chlor 100 grams, calcium chloride 100 grams, be labeled as A, B, C, D respectively, in the B beaker, add composite corrosion inhibitor 1 gram that example 1 makes then; In the C beaker, add composite corrosion inhibitor 4 grams that example 1 makes; In the D beaker, add composite corrosion inhibitor 8 grams that example 1 makes.

(3) will be hung in nylon rope in 4 solution in the beaker respectively through 4 tinsels that step (1) is handled, the nylon rope the other end is bundled on the glass stick, and with the glass stick frame the beaker mouth along on, tinsel is fully immersed in the solution.

(4) tinsel successive soaking after 48 hours in solution is put into concentration and is 3% hydrochloric acid soln after the taking-up, soak and take out the water flushing after 10 minutes, and after brushing remaining rust with test-tube brush, with alcohol flushing-acetone rinsing, nitrogen blowing is carried out drying successively, put into moisture eliminator, weigh one by one.

(5) rust-proof effect evaluation:

Test-results is as follows:

Erosion rate (R) calculation formula:

In the formula: S is the surface-area of tinsel, and T is etching time, and numerical value is 48 hours; D is the density of metal, and numerical value is 7.85 mg/cm ³8760 is the hourss in 1 year; 10 ⁴Be that etching extent has mg to be converted to g and erosion rate has cm to be converted to the unit conversion coefficient of mm.

Draw by the antirust experimental result to the composite corrosion inhibitor of embodiment 1-3: the composite corrosion inhibitor of villaumite type Snow Agent provided by the invention, rust-proof effect is better.

Claims (2)

1. the composite corrosion inhibitor of a villaumite type Snow Agent is characterized in that, its material composition by mass fraction is:

Sodium hexametaphosphate 99 12-35;

Water glass 8-20;

Primary zinc phosphate 5-20;

Sodium dodecylbenzene sulfonate 5-12;

Sodium tartrate 5-20;

Vulkacit H 4-12;

Propenyl thiocarbamide 6-13;

Mix by said ratio and to be composite corrosion inhibitor.

2. the application of the composite corrosion inhibitor of a villaumite type Snow Agent is characterized in that, the above-mentioned composite corrosion inhibitor that makes and villaumite mix by mass fraction 0.5-8:100 can pack sale.