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Ecological descaling type rapid sedimentation passivation solution and preparation process thereof

A technology of descaling and passivation liquid, applied in manufacturing tools, metal material coating process, metal rolling, etc., can solve the problem of medium lubricity, poor working stability, easy to block pipes and precision filters, oxide skin powder Problems such as poor sedimentation effect, to achieve the effect of reducing interface wear, long service life, good and stable antibacterial properties

Pending Publication Date: 2022-06-24
塞尔纳新材料(武汉)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As we all know, although sodium nitrite is used as a passivator, although it has good passivation, corrosion inhibition performance and low price, this kind of medium has poor lubricity and working stability, and the sedimentation effect of oxide skin powder is not good, and it is easy to block pipelines and precision filters. The high-pressure pump is easily damaged, and the maintenance rate on the production site is high, and nitrite will have carcinogenic effect after being absorbed by the human body. Nitrite has been clearly banned or restricted as a carcinogenic substance at home and abroad, so the traditional sodium nitrite Passivation solution can no longer meet the needs of modern industrial phosphorus removal production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Embodiment 1 provides a kind of ecological descaling type fast sedimentation passivation liquid, preparation raw material comprises metal complexing agent 65kg, corrosion inhibitor 235kg, passivation accelerator 100kg, lubricant 100kg, surfactant 10kg, antiseptic 20kg, Settling agent 5kg, foam inhibitor 2kg, water 483kg.

[0060] Described metal complexing agent comprises disodium EDTA 15kg, phytate 50kg;

[0061] The corrosion inhibitor includes 100kg of trihydroxytriethylamine and 135kg of borate;

[0062] Described passivation accelerator comprises sodium molybdate 95kg, benzotriazole sodium 5kg;

[0063] The lubricant includes 60kg polyether 17R4 and 40kg polyether 17R2; the polyether 17R4 is Synative17R4, which is purchased from BASF, and the polyether 17R2 is Synative17R2, which is purchased from BASF;

[0064] The surfactant includes 10kg Berol840; purchased from AkzoNobel Chemical Co., Ltd.;

[0065] Described preservative includes 5kg sodium lactate, 15kg tr...

Embodiment 2

[0072] Embodiment 2 provides a kind of ecological descaling type fast sedimentation passivation liquid, and preparation raw material comprises metal complexing agent 60kg, corrosion inhibitor 270kg, passivation accelerator 125kg, lubricant 120kg, surfactant 5kg, antiseptic 20kg, Settling agent 7kg, foam inhibitor 3kg, water 390kg.

[0073] The metal complexing agent comprises 10kg of tetrasodium EDTA, 10kg of ATMP, and 40kg of phytate;

[0074] The corrosion inhibitor includes 120kg of 2-aminoethanol, 50kg of undecanedicarboxylic acid, and 100kg of polyamide; the polyamide is NEUF188 purchased from Nuotai Technology;

[0075] Described passivation accelerator comprises trimethylsilyl diethylamine 25kg, sodium molybdate 50kg, sodium tungstate 45kg, benzotriazole sodium salt 5kg;

[0076] The lubricant includes 60kg polyether 17R4, 60kg polyester; the polyether 17R4 is Synative17R4, purchased from BASF; the polyester is Priolube 3955 purchased from Croda;

[0077]The surfactan...

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Abstract

The invention belongs to the technical field of passivation solutions, and particularly relates to an ecological descaling type rapid sedimentation passivation solution which is prepared from the following raw materials: a metal complexing agent, a corrosion inhibitor, a passivation accelerant, a lubricant, a surfactant, a preservative, a sedimentation agent, a foam inhibitor and water. The material treated by the passivation solution completely meets the requirements of the subsequent process on the surface.

Description

technical field [0001] The invention belongs to the technical field of passivation solutions, and in particular relates to an ecological descaling type fast-settling passivation solution and a preparation process thereof. Background technique [0002] Steel plate is the "muscle" in modern buildings, and the removal of iron oxide scale on the surface of hot-rolled steel plate (commonly known as "descale") is the primary process of hot-rolled steel plate processing. Since the pickling process was successfully applied to industrial production in the middle of the last century, it has been the mainstream method for surface descaling of hot-rolled strips. The scale method has become the direction explored by technicians from all over the world. [0003] There are two traditional methods of descaling: 1. Chemical method: using strong acids such as sulfuric acid, hydrochloric acid, hydrofluoric acid, nitric acid, etc., this method removes phosphorus, produces high pollution, produ...

Claims

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Application Information

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IPC IPC(8): C23C22/62C23C22/73B21B45/08
CPCC23C22/62C23C22/73B21B45/08
Inventor 胡金霞张嘉琪
Owner 塞尔纳新材料(武汉)有限公司
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