CN105275243A

CN105275243A - Steel storage method with long-term rust protection

Info

Publication number: CN105275243A
Application number: CN201410246155.3A
Authority: CN
Inventors: 刘玉涛; 傅婧; 曹跃军; 王张栋
Original assignee: Zhongtian Construction Group Co Ltd
Current assignee: Zhongtian Construction Group Co Ltd
Priority date: 2014-06-05
Filing date: 2014-06-05
Publication date: 2016-01-27

Abstract

The present invention discloses a steel storage method with long-term rust protection. The method comprises the steps of building an open reservoir as a rust protection pool; filling the rust protection pool with water, putting lime into the pool, and adequately dissolving the lime to form whitewash; placing the steel in need of long-term storage into the whitewash of the rust protection pool; and closing a pool cover to isolate the rust protection pool from the outside; periodically detecting the concentration of the whitewash in the rust protection pool to ensure that the concentration of the whitewash is within a permissible range, maintaining an alkaline environment in the pool to prevent the whitewash from deteriorating, and discharging sediments at the bottom of the pool from a drainage hole. By utilizing the nature of the whitewash, an adequate alkaline environment is provided for the steel, air is well isolated, corrosion of the steel is delayed, the steel can be effectively protected for 6-12 months, requirements for long-terminal rust-proof storage of the stell are met, and the method is simple and convenient to operate, economical and environment-friendly.

Description

A kind of storage procedures of steel long-term rust prevention

Technical field

The present invention relates to the technical field of rust prevention of steel, particularly a kind of storage procedures of steel long-term rust prevention.

Background technology

Steel are in storage process, due to long term exposure in atmosphere, by the impact of air middle acid substance, chemical reaction can be there is and produce corrosion phenomena, the corrosion of steel not only can cause the loss of steel itself, material is reduced even scrap, and rust cleaning work can cause very large expending, make steel in use lifting surface area minimizing, the rust hole, local that corrosion is simultaneously formed, stress may be caused to concentrate, impel structure early damage, especially when course under cyclic loading, corrosion fatigue phenomenon will be produced, fatigue strength is greatly reduced, there is brittle fracture.

At present, antirust to steel is adopt brushing antirusting paint mostly, but antirusting paint can cause steel performance loss in use, affect bearing capacity and the durability of steel, brushing rush-resisting material technological requirement is higher, expend time in longer, and composition in antirusting paint is many containing noxious material, very not environmentally.

Apply for a patent the Chinese patent that publication number is CN103589210A, application discloses that a kind of metal species rustproof paint, this rustproof paint also may be used for the antirust of steel, but mixed by number of chemical raw material and form, easily to environment, each raw material is prepared in proportion, and process for preparation is comparatively complicated, and cost is higher, be not suitable for large-scale application.

Summary of the invention

In order to overcome above-mentioned the deficiencies in the prior art, the invention provides a kind of storage procedures of steel long-term rust prevention, the antirust shelf appeal that steel are long-term can be met, ensure that the performance of steel is unaffected, and steel antirust treatment is for carrying out in batches, significantly shorten the operating time, there is the advantage of economic environmental protection simultaneously.

The technical solution adopted in the present invention is: a kind of storage procedures of steel long-term rust prevention, when needs long storage periods steel, steel are deposited in and fill in the antirust pond of whitewash, with the contact of isolated steel and outside air, and provide a kind of alkaline environment for steel, avoid steel to be subject to the corrosion of acidic materials, delay the corrosion of steel, it is characterized in that following technical step:

Step one, builds a uncovered reservoir as antirust pond;

Step 2, fills water in antirust pond, is dropped into by lime in pond, lime is fully dissolved and makes whitewash;

Step 3, is positioned in the whitewash in antirust pond by needing the steel of long storage periods;

Step 4, closed Chi Gai, is isolated from the outside antirust pond.

After described step 4, preferably also comprise step:

Step 5, whitewash concentration in the antirust pond of periodic detection, ensures that whitewash concentration is in allowed band, maintains the alkaline environment in pond, prevents whitewash from going bad, and discharge sediment at the bottom of pond by drain hole.

In described step one, preferred described antirust pond inwall smears the thick waterproofing mortar of 20mm, ensures long-term storage ability.

In described step 2, preferred described whitewash concentration range remains on 0.05%-0.15%, makes solution keep alkalescent.

In described step 3, preferred described steel overall process in storage is surrounded by whitewash, ensures that steel are in alkaline environment, completely with air insulated.

In described step 4, preferred described Chi Gai covers the Chi Kou in antirust pond completely, can reduce the contact of whitewash and air and the irradiation of sunlight, delays the chemical change that whitewash produces, and reduces solution acid alkalinity destructiveness, avoids foreign material to fall in pond simultaneously.

In described step 5, the preferred described whitewash Concentration Testing cycle is 1 month, according to the solution concentration detected, appropriate interpolation lime or water, ensure that whitewash concentration is in allowed band, adopt detection method to be to whitewash sampling in antirust pond, making whitewash again become the CO2 amount of clarification and consumption from muddiness by passing into enough CO2 in sampling, calculating whitewash concentration.

In described step 5, described drain hole is arranged on pool wall bottom, is opened by drain hole and can discharge sediment at the bottom of pond, and the chemical reaction that sediment produces for whitewash and air generates, chemical equation is: CO2+Ca (OH) 2=CaCO3 ↓+H2O, and sediment is CaCO3.

Compared with prior art; the invention has the beneficial effects as follows: the present invention adopts in whitewash steel being immersed situ configuration and stores; utilize whitewash self property; for steel provide sufficient alkaline environment; good has isolated air; avoid the contact of steel and acidic materials; the corrosion of steel can be delayed; the floating rust of rust staining or surface affecting steel use is there is not in available protecting steel 6-12 month; meet the requirement of steel long-term rust prevention storage; and lime is cheap, material safety is high, not only cost-saving but also environmental protection.

Detailed description of the invention

Below by embodiment, the present invention will be further described.

In building operations, carry out long-term rust prevention storage to steel, be in order to avoid steel, in long term storage, corrosion occur, and utilize whitewash to protect steel before steel use, and guarantees that the mechanical property of steel is unaffected.Specific implementation method is as follows:

Build a uncovered concrete retention reservoir of rectangle at the scene as antirust pond, the thick waterproofing mortar of 20mm is smeared at antirust pond inwall when building, ensure its long-term storage ability, then in antirust pond, water is filled, lime is dropped in pond, lime is fully dissolved and makes the whitewash that concentration is 0.15%, solution is made to be alkalescent, be positioned in antirust pond by needing the reinforcing bar of long storage periods, and the reinforcing bar of all placements is submerged whitewash completely, ensure that reinforcing bar is in alkaline environment, with air insulated, finally cover Chi Gai, antirust pond is isolated from the outside, reduce whitewash and the contact of air and the irradiation of sunlight, delay the chemical change that whitewash produces, avoid foreign material to fall in pond simultaneously, at lay up period, every 1 month, primary sample detection is carried out to antirust pond, when whitewash concentration lower than 0.05% time, add lime in right amount in the solution, whitewash concentration is made to remain in the allowed band of 0.05%-0.15%, prevent whitewash from going bad, after pond prodelta clay tires out certain amount of CaCO 3 sediment, drain hole is opened and discharges sediment at the bottom of pond.

Adopt the reinforcing bar of whitewash storing technology process, after 6 months, do not occur the floating rust of rust staining or surface affecting use, reinforcing bar presentation quality is basic and be originally consistent, until 12 months time rust-proof effect still desirable, meet completely steel long-term rust prevention storage requirement.

Claims

1. a storage procedures for steel long-term rust prevention, delays the corrosion of steel, can meet the antirust shelf appeal that steel are long-term, it is characterized in that following technical step:

Step one, builds a uncovered reservoir as antirust pond;

Step 4, closed Chi Gai, is isolated from the outside antirust pond.

2. the storage procedures of a kind of steel long-term rust prevention according to claim 1, is characterized in that, after described step 4, also comprise step:

Step 5, whitewash concentration in the antirust pond of periodic detection, adds lime or water in right amount according to testing result, maintains whitewash concentration in allowed band, and discharges sediment at the bottom of pond.

3. the storage procedures of a kind of steel long-term rust prevention according to claim 1, is characterized in that, in described step one, antirust pond inwall smears the thick waterproofing mortar of 20mm.

4. the storage procedures of a kind of steel long-term rust prevention according to claim 1, is characterized in that, in described step 2, whitewash concentration range remains on 0.05%-0.15%.

5. the storage procedures of a kind of steel long-term rust prevention according to claim 1, is characterized in that, in described step 3, steel overall process in storage is surrounded by whitewash.

6. the storage procedures of a kind of steel long-term rust prevention according to claim 1, is characterized in that, in described step 4, Chi Gai covers the Chi Kou in antirust pond completely.

7. the storage procedures of a kind of steel long-term rust prevention according to claim 2, is characterized in that, in described step 5, the whitewash Concentration Testing cycle is 1 month, and detection method is CO2 detection method.

8. the storage procedures of a kind of steel long-term rust prevention according to claim 2, is characterized in that, in described step 5, after pond prodelta clay tires out a certain amount of sediment, opens the drain hole being arranged on pool wall bottom and is discharged by sediment.