CN109540775A - A method of detection evaluation grid equipment zinc coating quality - Google Patents
A method of detection evaluation grid equipment zinc coating quality Download PDFInfo
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- CN109540775A CN109540775A CN201811337278.2A CN201811337278A CN109540775A CN 109540775 A CN109540775 A CN 109540775A CN 201811337278 A CN201811337278 A CN 201811337278A CN 109540775 A CN109540775 A CN 109540775A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/006—Investigating resistance of materials to the weather, to corrosion, or to light of metals
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Abstract
Electric device maintenance technical field of the present invention, and in particular to a method of detection evaluation grid equipment zinc coating quality, specific steps include: each evaluation index of (1) detection grid equipment zinc coat；(2) corrosion class of grid equipment Service Environment is determined；(3) determine whether grid equipment zinc coat is qualified according to the corrosion class of determining grid equipment Service Environment and the testing result of zinc coat.Invention increases zinc coating qualities to evaluate key index: the corrosion class of grid equipment Service Environment, zinc coat evaluation index is determined according to grid equipment Service Environment, currently employed unified detection evaluation index is solved come the drawbacks of judging zinc coating quality, grid equipment extent of corrosion can be estimated in advance using the present invention, and then find grid equipment defect, reduce power networks risk.Simultaneously when meeting the requirement of Service Environment corrosion class, Certain Evaluation Guideline value is reduced, is also that power grid saves a large sum of investment cost.
Description
Technical field
A kind of electric device maintenance technical field of the present invention, and in particular to side of detection evaluation grid equipment zinc coating quality
Method.
Background technique
Hot dipping coating technology be it is a kind of will the substrate of immersion plating immerse in the coating metal or aluminium alloy of fusing, keep matrix table
Face and taken out after molten metal contact a period of time, be allowed to adhere to one layer it is uniform, any surface finish, with matrix firm connection
The guard method of anti-corrosion of metal coating.Galvanizing by dipping is widely used in grid equipment anti-corrosion at present, and examination criteria is numerous.Detection
Mesh is four zinc coat appearance, thickness, uniformity and adhesive force aspects.Appearance requirement surface is continuous, complete, must not have pickling,
The defects of plating leakage, dross, product zinc, burr.Uniformity uses copper sulfate test, and resistance to leaching zinc number is no less than 4 times, and does not reveal iron.
Adhesive force test uses drop weight test, and after drop weight test, zinc coat is not raised, does not remove.The zinc coat of electric power line pole tower
Thickness is determined according to plating piece thickness, and as plating piece thickness t >=5mm, thickness minimum value is 70 μm, and average minimum is 86 μm；
As plating piece thickness t < 5mm, thickness minimum value is 55 μm, and average minimum is 65 μm.Fitting galvanized layer thickness is steel according to product
Part or ironcasting and product thickness are determined, when product is steel part, thickness t >=6mm, thick minimum 70 μ of monomer zinc
M, overall zinc is minimum 85 μm, thickness t < 6mm thick, and monomer zinc is minimum 55 μm thick, and overall zinc is minimum 70 μm thick；Work as product
When for ironcasting, thickness t >=6mm, monomer zinc is minimum 70 μm thick, and overall zinc is minimum 80 μm, thickness t < 6mm thick, monomer zinc
Minimum 60 μm thick, overall zinc is minimum 70 μm thick.Bolt and nut galvanized layer thickness require monomer zinc thickness to be not less than 40 μm, always
Body zinc thickness is not less than 50 μm.
However, existing detection evaluation criterion is not treated with a certain discrimination according to corrosion class degree, it is all made of unified detection
Evaluation criterion.In addition, examination criteria does not account for detecting galvanizing by dipping passivation effect yet, because the quality of passivation effect is directly
Determine zinc-plated resistance corrosive power, passivation is bad to be easy to appear white corrosion product, accelerated corrosion.During actually detected test
, it was also found that the galvanized part of passivation effect difference, impedance value is lower than 8000 ohm, and corrosion accelerated test 100h starts red rust out；And
The galvanized part of good passivation effect, impedance value are higher than 10000 ohm, just start red rust out after corroding accelerated test 200h.This
It results in seriously corroded regional power grid equipment just to start gradually to corrode after putting into operation 5~6 years, partially corrodes serious or even complete
Full corrosion, brings great threat to power network safety operation.Therefore, it improves existing detection and evaluates zinc coating quality method, increase
Add zinc coating quality to evaluate key index, is treated with a certain discrimination according to corrosion class degree, it is very necessary.
Summary of the invention
To solve the above-mentioned problems, the present invention provides a kind of Distribution Network Equipment vendors' evaluating method, particular techniques
Scheme is as follows:
It is a kind of detection evaluation grid equipment zinc coating quality method the following steps are included:
(1) each evaluation index of grid equipment zinc coat is detected；The evaluation index includes 2 level-one evaluation indexes, specifically
Are as follows: grid equipment Service Environment index, zinc coat Performance Evaluating Indexes；The grid equipment Service Environment index includes 4 two
Grade index, specifically: atmosphere humidity time, dust in air content, chlorate in content of sulphur compounds and air in air
Content；The zinc coat Performance Evaluating Indexes include 5 two-level index, specifically: appearance, thickness, uniformity, adhesive force and resistance
It is anti-；
(2) according to the corrosion class for determining grid equipment Service Environment to the testing result of grid equipment Service Environment index；
(3) according to the corrosion class of determining grid equipment Service Environment, and detection zinc coat Performance Evaluating Indexes it is each
A two-level appraisement index as a result, determine grid equipment zinc coat it is whether qualified, if any the one of zinc coat Performance Evaluating Indexes
The testing result of a two-level appraisement index requires not being inconsistent with corresponding corrosion class, determines corresponding grid equipment zinc coat not
It is qualified.
Preferably, the monitoring cycle of the detection grid equipment Service Environment index is 3-12 months.
Preferably, the corrosion class is C1, C2, C3, C4, C5；The grid equipment under corresponding corrosion class is zinc-plated
The thickness requirement of layer is as shown in table 1 below.
Grid equipment galvanized layer thickness demand items table under each corrosion class of table 1
Preferably, the resistance requirements of grid equipment zinc coat are as shown in table 2 below under corresponding corrosion class.
Grid equipment zinc coat resistance requirements detail list under each corrosion class of table 2
| Corrosion class | C1 | C2 | C3 | C4 | C5 |
| Impedance minimum (Ω) | 8000 | 8000 | 8000 | 10000 | 10000 |
The invention has the benefit that invention increases zinc coating qualities to evaluate key index, according to grid equipment military service ring
Border determines zinc coat evaluation index, solves currently employed unified detection evaluation index come the drawbacks of judging zinc coating quality,
It avoids grid equipment just to start gradually to corrode after seriously corroded region is put into operation 5~6 years, or partially corrodes serious or even complete
Full corrosion problem, can estimate grid equipment extent of corrosion, and then find grid equipment defect in advance using the present invention,
Reduce power networks risk.Simultaneously when meeting the requirement of Service Environment corrosion class, Certain Evaluation Guideline value is reduced,
Also a large sum of investment cost is saved for power grid.
Detailed description of the invention
Fig. 1 is flow diagram of the invention.
Specific embodiment
In order to better understand the present invention, the present invention will be further explained below with reference to the attached drawings and specific examples:
As shown in Figure 1, it is a kind of detection evaluation grid equipment zinc coating quality method the following steps are included:
(1) each evaluation index of grid equipment zinc coat is detected；Evaluation index includes 2 level-one evaluation indexes, specifically: electricity
Net equipment Service Environment index, zinc coat Performance Evaluating Indexes；Grid equipment Service Environment index includes 4 two-level index, tool
Body are as follows: atmosphere humidity time, dust in air content, chlorination salt content in content of sulphur compounds and air in air；It is zinc-plated
Layer Performance Evaluating Indexes include 5 two-level index, specifically: appearance, thickness, uniformity, adhesive force and impedance；Detection power grid is set
The monitoring cycle of standby Service Environment index is 3-12 months.Wherein grid equipment zinc coat appearance is detected as visual detection, can be with
By 10x magnifying glass, surface requirements are continuous, complete, must not there is the defects of pickling, plating leakage, dross, product zinc, burr.Zinc-plated thickness
Degree is detected according to GB/T4956 standard requirements using metal electroplating layer calibrator；Specific requirement such as the following table 2.Uniformity uses
Copper sulfate test, resistance to leaching zinc number is no less than 4 times, and does not reveal iron.Adhesive force test uses drop weight test, after drop weight test,
Zinc coat is not raised, does not remove.Impedance measurement is detected using impedance analyzer, and specific requirement is as shown in table 3 below.
(2) according to the corrosion etc. for determining grid equipment Service Environment to the testing result of grid equipment Service Environment index
Grade；" corrosive atmosphere of metal and alloy is rotten according to standard GB/T19292.1-2003 for the corrosion class of grid equipment Service Environment
Corrosion classification " it is classified, corrosion class is divided into 5 corrosion class such as C1, C2, C3, C4, C5；Shown in table 1 specific as follows.
The classification of 1 atmospheric corrosiveness of table
| Rank | Corrosivity |
| C1 | It is very low |
| C2 | It is low |
| C3 | It is medium |
| C4 | It is high |
| C5 | It is very high |
(3) according to the corrosion class of determining grid equipment Service Environment, and detection zinc coat Performance Evaluating Indexes it is each
A two-level appraisement index as a result, determine grid equipment zinc coat it is whether qualified, if any the one of zinc coat Performance Evaluating Indexes
The testing result of a two-level appraisement index requires not being inconsistent with corresponding corrosion class, determines corresponding grid equipment zinc coat not
It is qualified.
The thickness requirement of grid equipment zinc coat is as shown in table 2 below under corresponding corrosion class.
Grid equipment galvanized layer thickness demand items table under each corrosion class of table 2
The resistance requirements of grid equipment zinc coat are as shown in table 3 below under corresponding corrosion class.
Grid equipment zinc coat resistance requirements detail list under each corrosion class of table 3
| Corrosion class | C1 | C2 | C3 | C4 | C5 |
| Impedance minimum (Ω) | 8000 | 8000 | 8000 | 10000 | 10000 |
The present invention be not limited to more than specific embodiment, the above is only preferable case study on implementation of the invention, and do not have to
To limit the present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all be wrapped
Containing within protection scope of the present invention.
Claims (4)
1. a kind of method of detection evaluation grid equipment zinc coating quality, it is characterised in that: the following steps are included:
(1) each evaluation index of grid equipment zinc coat is detected；The evaluation index includes 2 level-one evaluation indexes, specifically
Are as follows: grid equipment Service Environment index, zinc coat Performance Evaluating Indexes；The grid equipment Service Environment index includes 4 two
Grade index, specifically: atmosphere humidity time, dust in air content, chlorate in content of sulphur compounds and air in air
Content；The zinc coat Performance Evaluating Indexes include 5 two-level index, specifically: appearance, thickness, uniformity, adhesive force and resistance
It is anti-；
(2) according to the corrosion class for determining grid equipment Service Environment to the testing result of grid equipment Service Environment index；
(3) according to the corrosion class of determining grid equipment Service Environment, and detection zinc coat Performance Evaluating Indexes it is each
A two-level appraisement index as a result, determine grid equipment zinc coat it is whether qualified, if any the one of zinc coat Performance Evaluating Indexes
The testing result of a two-level appraisement index requires not being inconsistent with corresponding corrosion class, determines corresponding grid equipment zinc coat not
It is qualified.
2. a kind of method of detection evaluation grid equipment zinc coating quality according to claim 1, it is characterised in that: described
The monitoring cycle for detecting grid equipment Service Environment index is 3-12 months.
3. a kind of method of detection evaluation grid equipment zinc coating quality according to claim 1, it is characterised in that: described
Corrosion class is C1, C2, C3, C4, C5；Thickness requirement such as the following table 1 of the grid equipment zinc coat under corresponding corrosion class
It is shown.
Grid equipment galvanized layer thickness demand items table under each corrosion class of table 1
4. a kind of method of detection evaluation grid equipment zinc coating quality according to claim 3, it is characterised in that: right
Answer the resistance requirements of grid equipment zinc coat under corrosion class as shown in table 2 below.
Grid equipment zinc coat resistance requirements detail list under each corrosion class of table 2
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811337278.2A CN109540775B (en) | 2018-11-12 | 2018-11-12 | Method for detecting and evaluating quality of zinc coating of power grid equipment |
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| CN201811337278.2A CN109540775B (en) | 2018-11-12 | 2018-11-12 | Method for detecting and evaluating quality of zinc coating of power grid equipment |
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| CN109540775A true CN109540775A (en) | 2019-03-29 |
| CN109540775B CN109540775B (en) | 2021-06-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111983359A (en) * | 2020-08-24 | 2020-11-24 | 西南交通大学 | Method for monitoring and evaluating state of transmission tower under lightning stroke |
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| CN103198210A (en) * | 2013-03-07 | 2013-07-10 | 中国石油天然气集团公司 | Method and equipment for detecting and evaluating inner drag-reducing coating of natural gas pipeline |
| CN103530820A (en) * | 2013-10-23 | 2014-01-22 | 国家电网公司 | Modeling method of smart grid technology assessment |
| CN107274056A (en) * | 2017-05-04 | 2017-10-20 | 国家电网公司 | A kind of power network saving energy and decreasing loss schemes synthesis evaluation method |
-
2018
- 2018-11-12 CN CN201811337278.2A patent/CN109540775B/en active Active
Patent Citations (4)
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|---|---|---|---|---|
| CN102073935A (en) * | 2010-12-29 | 2011-05-25 | 北京理工大学 | Universal comprehensive evaluation system and method for customizing evaluation index system thereof |
| CN103198210A (en) * | 2013-03-07 | 2013-07-10 | 中国石油天然气集团公司 | Method and equipment for detecting and evaluating inner drag-reducing coating of natural gas pipeline |
| CN103530820A (en) * | 2013-10-23 | 2014-01-22 | 国家电网公司 | Modeling method of smart grid technology assessment |
| CN107274056A (en) * | 2017-05-04 | 2017-10-20 | 国家电网公司 | A kind of power network saving energy and decreasing loss schemes synthesis evaluation method |
Non-Patent Citations (2)
| Title |
|---|
| 中华人民共和国国家质量监督检验检疫总局: "《中华人民共和国国家标准 GB/T 19292.1-2003/ISO 9223：1992》", 12 September 2003 * |
| 国家能源局: "《中华人民共和国电力行业标准 DL/T 1425-2015》", 2 April 2015 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111983359A (en) * | 2020-08-24 | 2020-11-24 | 西南交通大学 | Method for monitoring and evaluating state of transmission tower under lightning stroke |
| CN111983359B (en) * | 2020-08-24 | 2021-07-02 | 西南交通大学 | Method for monitoring and evaluating state of transmission tower under lightning stroke |
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| CN109540775B (en) | 2021-06-22 |
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