CN112179834A - Structural member cooperative acceleration test method considering corrosion and fatigue coupling effects - Google Patents

Structural member cooperative acceleration test method considering corrosion and fatigue coupling effects Download PDF

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CN112179834A
CN112179834A CN202010988706.9A CN202010988706A CN112179834A CN 112179834 A CN112179834 A CN 112179834A CN 202010988706 A CN202010988706 A CN 202010988706A CN 112179834 A CN112179834 A CN 112179834A
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corrosion
fatigue
structural member
power supply
loading device
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CN112179834B (en
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宗亮
司启
丁阳
李忠献
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Tianjin University
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Abstract

The invention relates to a structural member cooperative acceleration test method considering corrosion and fatigue coupling effects, which comprises the following steps: determining the expected corrosion degree and fatigue damage degree of the metal structural part within a certain age; placing the structural part and the inert electrode in a corrosion container, wherein the structural part is connected with the positive pole of a direct current power supply, and the inert electrode is connected with the negative pole of the power supply; connecting the structural member in the corrosion container with a fatigue loading device; adding an electrolytic corrosion solution corresponding to a corrosion environment into a corrosion container to achieve a similar corrosion appearance under a natural corrosion condition; calculating the electrifying corrosion time and the fatigue loading frequency according to the target corrosion amount and the fatigue degree; and simultaneously turning on a power switch and a fatigue loading device switch, carrying out corrosion fatigue coupling loading on the structural member, and turning off the direct-current power supply and the fatigue loading device after reaching the preset electrifying time t.

Description

Structural member cooperative acceleration test method considering corrosion and fatigue coupling effects
Technical Field
The invention relates to the field of metal material corrosion fatigue tests, in particular to a structural member synergy acceleration test method with corrosion and fatigue coupling effects.
Background
In the use process of the metal structural member, the metal structural member is inevitably corroded gradually along with the lapse of time, and the corrosion can cause the defects of holes, corrosion pits, cracks, corrosion layers and the like on the surface of the member, so that the geometric dimension of the effective stressed section of the member is reduced, and the bearing capacity and the energy consumption performance of the member are also reduced. However, for a metal structural member, the metal structural member is subjected to atmospheric environment corrosion and simultaneously needs to bear continuous and alternating actions of fatigue loads of wind, waves, vehicles and the like, although the fatigue damage does not cause immediate failure and damage of the steel structural member, the bearing and deformation capacity of the structure is obviously reduced under the action of long-term accumulated damage, so that the load or deformation borne by the structure or the structural member is subjected to brittle fracture and damage under the condition of being far lower than the self resistance. The corrosion can reduce the strength of the steel and the fatigue life, and the fatigue promotes the generation and the development of the corrosion, and the corrosion and the fatigue are supplemented with each other to jointly promote the formation of the corrosion fatigue coupling damage problem. At present, the accelerated test method for the corrosion fatigue of the metal structural part is to add a corrosion environment on the basis of a fatigue test, the problem of matching between a corrosion rate and a fatigue loading rate is not considered, and the cooperative accelerated test of the quantitative damage of the metal structural part under the coupling action of corrosion and fatigue is difficult to realize.
Disclosure of Invention
The invention aims to provide a cooperative acceleration test method for a structural part considering corrosion and fatigue coupling effects, which can realize quantitative control on corrosion and fatigue damage and realize a cooperative acceleration test for quantitative damage of a metal structural part under the corrosion and fatigue coupling effects. The technical scheme is as follows:
a structural member synergy acceleration test method considering corrosion and fatigue coupling effects comprises the following steps:
(a) determining the expected corrosion degree eta of the metal structural component within a certain age1And degree of fatigue damage eta2。
(b) Placing a structural part and an inert electrode in a corrosion container, connecting the structural part with the positive electrode of a direct-current power supply, connecting the inert electrode with the negative electrode of the power supply, sealing the structural part except a corrosion part, recording the area of the corrosion part of the structural part as A, determining the current density of the electrified accelerated corrosion as I, and determining the current size I of the electrified accelerated corrosion as i.A;
(c) connecting the structural member in the corrosion container with a fatigue loading device;
(d) adding an electrolytic corrosion solution corresponding to a corrosion environment into a corrosion container to achieve a similar corrosion appearance under a natural corrosion condition;
(e) calculating the electrifying corrosion time and the fatigue loading frequency according to the target corrosion amount and the fatigue degree: according to faraday's law, the quantity of electricity Q passing on an electrode is proportional to the quantity m of the substance chemically reacting on the electrode, i.e.: q ═ mF, for galvanic corrosion: q is I · t, and therefore,
Figure BDA0002690093820000011
the power-on time is
Figure BDA0002690093820000012
In the formula: f is Faraday constant, t is energizing time(s), m0The initial mass (g) of the test piece, the Δ M is the mass (g) of rusting, n is the number of electrons lost by metal galvanic corrosion, M is the molar mass (g/mol) of the metal, and the fatigue loading frequency is determined according to the duration of the galvanic corrosion
Figure BDA0002690093820000021
In the formula: n is a radical offFatigue life for metallic structures;
(f) and simultaneously turning on a power switch and a fatigue loading device switch, carrying out corrosion fatigue coupling loading on the structural member, and turning off the direct-current power supply and the fatigue loading device after reaching the preset electrifying time t.
In the step (d), NaCl solution with the mass fraction of 3.5% can be used for simulating the seawater corrosion environment. The mixed solution of sodium acetate and sodium chloride can be used for simulating the atmospheric corrosion environment in the step (d).
Drawings
FIG. 1 is a schematic view of a corrosion site and a non-corrosion site in a structural member;
FIG. 2 is a schematic view of the connection of the structural member to the corrosion vessel and power supply;
fig. 3 is a loading schematic diagram of a structural member placed in a corrosion vessel after connection with a fatigue loading device.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Firstly, the corrosion degree eta of the metal structural component is determined1And degree of fatigue damage eta2；
Measuring the area A of the corrosion part of the metal structural part, determining the current density i of the electrified corrosion, and wrapping the rest parts of the metal structural part by using waterproof adhesive tapes or epoxy resin, as shown in figure 1;
placing a metal structural part and an inert electrode in a corrosion container, wherein the structural part is connected with the positive electrode of a direct current power supply, and the inert electrode is connected with the negative electrode of the power supply, as shown in figure 2;
connecting the structural member placed in the corrosion vessel with a fatigue loading device, as shown in fig. 3;
adding an electrolytic corrosion solution corresponding to a corrosion environment into a corrosion container, simulating a seawater corrosion environment to use a NaCl solution with the mass fraction of 3.5%, and simulating an atmospheric corrosion environment to use a mixed solution of sodium acetate and sodium chloride so as to achieve a corrosion shape similar to that under a natural corrosion condition;
after the metal structural member is installed, the power switch and the fatigue loading device switch are simultaneously turned on, the current of the direct current power supply is adjusted to be I.A, and the electrifying time is set to be
Figure BDA0002690093820000022
Adjusting the loading frequency of the fatigue loading device to
Figure BDA0002690093820000023
In the formula: f is the Faraday constant, I is the current (A) through the structure, t is the energizing time(s), m0Is the initial mass (g) of the test piece,. DELTA.m is the rusted mass (g), and n is the corrosion loss of the metal by energizationThe number of electrons removed; m is the molar mass (g/mol) of the metal, NfIs the fatigue life of the metal structural member.
And after the preset time t is reached, simultaneously closing the direct-current power supply and the fatigue loading device, and realizing the cooperative accelerated loading of the quantitative damage of the metal structural part under the coupling action of corrosion and fatigue.

Claims (3)

1. A structural member synergy acceleration test method considering corrosion and fatigue coupling effects comprises the following steps:
(a) determining the expected corrosion degree eta of the metal structural component within a certain age1And degree of fatigue damage eta2。
(b) Placing a structural part and an inert electrode in a corrosion container, connecting the structural part with the positive electrode of a direct-current power supply, connecting the inert electrode with the negative electrode of the power supply, sealing the structural part except a corrosion part, recording the area of the corrosion part of the structural part as A, determining the current density of the electrified accelerated corrosion as I, and determining the current size I of the electrified accelerated corrosion as i.A;
(c) connecting the structural member in the corrosion container with a fatigue loading device;
(d) adding an electrolytic corrosion solution corresponding to a corrosion environment into a corrosion container to achieve a similar corrosion appearance under a natural corrosion condition;
(e) calculating the electrifying corrosion time and the fatigue loading frequency according to the target corrosion amount and the fatigue degree: according to faraday's law, the quantity of electricity Q passing on an electrode is proportional to the quantity m of the substance chemically reacting on the electrode, i.e.: q ═ mF, for galvanic corrosion: q is I · t, and therefore,
Figure FDA0002690093810000011
the power-on time is
Figure FDA0002690093810000012
In the formula: f is Faraday constant, t is energizing time(s), m0Is the initial mass (g) of the test piece,. DELTA.m is the mass (g) at which corrosion occurred, and n is the number of electrons lost by galvanic corrosion of the metalM is the molar mass (g/mol) of the metal, and the fatigue loading frequency is determined according to the electrifying time length
Figure FDA0002690093810000013
In the formula: n is a radical offFatigue life for metallic structures;
(f) and simultaneously turning on a power switch and a fatigue loading device switch, carrying out corrosion fatigue coupling loading on the structural member, and turning off the direct-current power supply and the fatigue loading device after reaching the preset electrifying time t.
2. The method of claim 1, wherein in step (d), the seawater corrosion environment is simulated by using 3.5% by mass of NaCl solution.
3. The method of claim 1, wherein the step (d) is performed by using a mixed solution of sodium acetate and sodium chloride to simulate an atmospheric corrosive environment.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113640097A (en) * 2021-07-29 2021-11-12 北京科技大学 Constant-temperature stress corrosion device and test method for multi-anchor-body test piece
CN116973294A (en) * 2023-06-01 2023-10-31 天津大学 Corrosion fatigue test method considering matching relation between environmental corrosion rate and load history

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56104234A (en) * 1980-01-23 1981-08-19 Mitsubishi Heavy Ind Ltd Testing method for long life by corrosion fatigue
CN101660985A (en) * 2008-08-27 2010-03-03 中国科学院金属研究所 Equipment for implementing synchronous dry-wet alternate accelerated corrosion in loading process and application thereof
US20110054840A1 (en) * 2009-08-26 2011-03-03 Hively Lee M Failure prediction of complex structures under arbitrary time-serial loading condition
CN104949892A (en) * 2015-07-08 2015-09-30 华东交通大学 Stray current, chloridion and bending fatigue coupling loading simulating device
CN105588751A (en) * 2016-03-07 2016-05-18 长沙理工大学 Reinforced concrete bonding segment drawing fatigue and corrosion coupling testing device and testing method
CN107202740A (en) * 2017-07-18 2017-09-26 西北工业大学 It is a kind of to simulate the experimental rig for washing away fatigue
CN109211772A (en) * 2018-10-26 2019-01-15 北京工业大学 A method of accelerating soldered fitting corrosion fatigue test
CN109827855A (en) * 2018-08-30 2019-05-31 长沙理工大学 Seasonality corrosion couples down Reinforced Concrete Bridge life-span prediction method with fatigue
CN110044740A (en) * 2019-04-22 2019-07-23 东南大学 Measuring method, application, device and the fixture of cable steel wire corrosion fatigue damage rule

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56104234A (en) * 1980-01-23 1981-08-19 Mitsubishi Heavy Ind Ltd Testing method for long life by corrosion fatigue
CN101660985A (en) * 2008-08-27 2010-03-03 中国科学院金属研究所 Equipment for implementing synchronous dry-wet alternate accelerated corrosion in loading process and application thereof
US20110054840A1 (en) * 2009-08-26 2011-03-03 Hively Lee M Failure prediction of complex structures under arbitrary time-serial loading condition
CN104949892A (en) * 2015-07-08 2015-09-30 华东交通大学 Stray current, chloridion and bending fatigue coupling loading simulating device
CN105588751A (en) * 2016-03-07 2016-05-18 长沙理工大学 Reinforced concrete bonding segment drawing fatigue and corrosion coupling testing device and testing method
CN107202740A (en) * 2017-07-18 2017-09-26 西北工业大学 It is a kind of to simulate the experimental rig for washing away fatigue
CN109827855A (en) * 2018-08-30 2019-05-31 长沙理工大学 Seasonality corrosion couples down Reinforced Concrete Bridge life-span prediction method with fatigue
CN109211772A (en) * 2018-10-26 2019-01-15 北京工业大学 A method of accelerating soldered fitting corrosion fatigue test
CN110044740A (en) * 2019-04-22 2019-07-23 东南大学 Measuring method, application, device and the fixture of cable steel wire corrosion fatigue damage rule

Non-Patent Citations (7)

* Cited by examiner, † Cited by third party
Title
ALMUSALLAM A A: "Effect of degree of corrosion on theproperties of reinforcing steel bars", 《CONSTRUCTION ANDBUILDING MATERIALS》 *
SOBHY M: "CFRP-strenghtened and corrodedRC beams under monotonic and fatigue loads", 《JOURNAL OFCOMPOSITES FOR CONSTRUCTION》 *
孙波: "预腐蚀后超载对LC4CS铝合金疲劳性能的影响", 《青岛大学学报(工程技术版)》 *
张春涛等: "腐蚀和疲劳耦合作用下Q345角钢拟静力试验研究", 《上海交通大学学报》 *
李鸿鹏等: "LY12CZ铝合金腐蚀疲劳研究进展", 《腐蚀科学与防护技术》 *
韩基刚等: "梁内受腐蚀预应力钢绞线应力状态研究", 《建筑结构》 *
马兴亮等: "一种考虑力学因素的钢结构腐蚀疲劳寿命评估方法", 《钢结构》 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113640097A (en) * 2021-07-29 2021-11-12 北京科技大学 Constant-temperature stress corrosion device and test method for multi-anchor-body test piece
CN113640097B (en) * 2021-07-29 2023-01-24 北京科技大学 Constant-temperature stress corrosion device and test method for multi-anchor-body test piece
CN116973294A (en) * 2023-06-01 2023-10-31 天津大学 Corrosion fatigue test method considering matching relation between environmental corrosion rate and load history
CN116973294B (en) * 2023-06-01 2024-03-12 天津大学 Corrosion fatigue test method considering matching relation between environmental corrosion rate and load history

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