CN105547974A - Determination method of sensitivity grade of intergranular corrosion of 5083 alloy sheet materials - Google Patents
Determination method of sensitivity grade of intergranular corrosion of 5083 alloy sheet materials Download PDFInfo
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Abstract
The present invention discloses a determination method of sensitivity grade of intergranular corrosion of 5083 alloy sheet materials, and the method comprises the following steps: step A, collecting first samples of a plurality of 5083 alloy sheet materials, detecting intergranular corrosion of the first samples, and grading the first samples according to mass loss per unit area; step B, collecting second samples of a plurality of 5083 alloy sheet materials, sensitizing the second samples and detecting intergranular corrosion of the second samples, and grading the second samples according to mass loss per unit area; step C, under a metallographic microscope, observing microscopic structures of the first samples subjected to the step A and the second samples subjected to the step B to obtain metallographic maps; and step D, under the metallographic microscope, respectively observing the microstructures of the plurality of 5083 alloy sheet materials to be tested, comparing with the metallographic maps obtained by the step C, and determining the sensitivity grade of the intergranular corrosion of the plurality of 5083 alloy sheet materials to be tested. The testing cycle can be shortened by use of the metallographic maps.
Description
Technical field
The present invention relates to fractograph technical field, especially relate to a kind of 5083 sheet alloy Susceptibility To Intergranular Corrosion rank decision methods.
Background technology
5xxx system alloy is a kind of non-heat treated reinforced alloys with medium tenacity, excellent corrosion resistance and weldability, and such alloy, in seawater and marine atmosphere condition, not only have the performance of excellent opposing general corrosion, and anti intercrystalline corrosion performance is better.And 5083 alloys have the combination properties such as suitable intensity, corrosion stability and manufacturability, that therefore applies on boats and ships is the most extensive.
At present, 5083 sheet alloys carry out Susceptibility To Intergranular Corrosion rank judge need preparation standard sample to test, sample preparation and sense cycle long.
Therefore, how shortening 5083 sheet alloy Susceptibility To Intergranular Corrosion sense cycle is those skilled in the art's technical matterss urgently to be resolved hurrily.
Summary of the invention
In view of this, the object of this invention is to provide a kind of 5083 sheet alloy Susceptibility To Intergranular Corrosion rank decision methods, the sense cycle that 5083 sheet alloy Susceptibility To Intergranular Corrosion ranks judge can be shortened.
To achieve these goals, the invention provides following scheme:
A kind of 5083 sheet alloy Susceptibility To Intergranular Corrosion rank decision methods, comprise the following steps:
Steps A: the first sample of 5083 sheet alloys collecting multiple different size, different conditions, after carrying out intercrystalline corrosion detection to described first sample collected, according to the mass loss of unit area to described first sample divided rank;
Step B: the second sample of 5083 sheet alloys collecting multiple different size, different conditions, carries out after sensitized treatment and intercrystalline corrosion detect to described second sample, according to the mass loss of unit area to described second sample divided rank;
Step C: in the microstructure of the microstructure of metallography microscope Microscopic observation through the first sample of described steps A and the second sample through step B, and obtain the fractograph of the correspondence of described first sample and described second sample respectively;
Step D: the microstructure of observing multiple 5083 sheet alloys to be detected under described metaloscope respectively, the described fractograph that contrast step C obtains, judges the Susceptibility To Intergranular Corrosion rank of multiple described 5083 sheet alloys to be detected.
Preferably, in above-mentioned 5083 sheet alloy Susceptibility To Intergranular Corrosion rank decision methods, in described steps A and described step B to carry out grade classification to described first sample collected and described second sample be utilize the standard of ASTMG67 to divide.
Preferably, in above-mentioned 5083 sheet alloy Susceptibility To Intergranular Corrosion rank decision methods, the first sample of the different conditions in described steps A is respectively the sample of 5083H111,5083H321 and 5083H116.
Preferably, in above-mentioned 5083 sheet alloy Susceptibility To Intergranular Corrosion rank decision methods, the second sample of the different conditions in described step B is respectively the sample of 5083H111 and 5083H321.
Preferably, in above-mentioned 5083 sheet alloy Susceptibility To Intergranular Corrosion rank decision methods, described sensitized treatment for described second sample is heated to 180 degree, and is incubated 96 hours.
Preferably, in above-mentioned 5083 sheet alloy Susceptibility To Intergranular Corrosion rank decision methods, before described steps A, also step D is comprised:
From calendering, factory obtains described first sample.
Preferably, in above-mentioned 5083 sheet alloy Susceptibility To Intergranular Corrosion rank decision methods, between described steps A and described step B, also step e is comprised:
From calendering, factory obtains described second sample.
As can be seen from above-mentioned technical scheme, 5083 sheet alloy Susceptibility To Intergranular Corrosion rank decision methods provided by the invention, carry out intercrystalline corrosion detection to the first sample of 5083 sheet alloys of the different size collected, different conditions; Sensitized treatment and intercrystalline corrosion detection are carried out to the second sample of 5083 sheet alloys of the different size collected, different conditions; Finally obtain the fractograph of the first sample and the second sample, under metaloscope, observe the microstructure of multiple 5083 sheet alloys to be detected respectively, contrast the fractograph obtained, judge the Susceptibility To Intergranular Corrosion rank of multiple 5083 sheet alloys to be detected.5083 sheet alloy Susceptibility To Intergranular Corrosion rank decision methods provided by the invention, its Susceptibility To Intergranular Corrosion rank is judged by the microstructure of 5083 alloys to be detected observed under metaloscope and 5083 microstructure of the alloy collection of illustrative plates are carried out contrast, shorten the judgement cycle of 5083 sheet alloy Susceptibility To Intergranular Corrosion ranks, efficient and convenient.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The schematic flow sheet of the 5083 sheet alloy Susceptibility To Intergranular Corrosion rank decision methods that Fig. 1 provides for the embodiment of the present invention one;
The schematic flow sheet of the 5083 sheet alloy Susceptibility To Intergranular Corrosion rank decision methods that Fig. 2 provides for the embodiment of the present invention two.
Embodiment
In order to make those skilled in the art better understand technical scheme of the present invention, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Explanation of nouns:
Sensitization phenomenon: 5083 alloys are long-time in 50 ~ 200 DEG C of temperature ranges to be used or after process, can produce very strong intercrystalline corrosion and intergranular stress corrosion susceptibility, phenomenon that Here it is so-called " sensitization ", the β phase (Mg of this phenomenon and intercrystalline precipitation
2al
3) relevant.Be greater than in the almag of 3.0% containing magnesium, can not decompose completely even if αsolidsolution is annealed, be in hypersaturated state and very unstable, β phase nethike embrane can be formed along crystal boundary in room temperature or slightly under high-temperature condition, thus very responsive to intercrystalline corrosion, corrosion-resistant ability also dies down.
Fractograph is the foundation of metal lographic examination, by the displaing micro tissue topography of basis of microscopic observation to sample being contrasted with standard diagram, thus can judge the whether qualified of product.
Embodiment one
Referring to Fig. 1, is the schematic flow sheet of 5083 sheet alloy Susceptibility To Intergranular Corrosion rank decision methods provided by the invention.
The invention provides a kind of 5083 sheet alloy Susceptibility To Intergranular Corrosion rank decision methods, comprise the following steps:
Step S1: collect multiple first sample, after carrying out intercrystalline corrosion detection to the first sample collected, according to the mass loss of unit area to the first sample divided rank;
Collect first sample of 5083 sheet alloys of multiple different size, different conditions, after carrying out intercrystalline corrosion detection to the first sample collected, according to mass loss to the first sample divided rank; It should be noted that, divided rank evaluates the mass loss rank of the first sample, then judges the Susceptibility To Intergranular Corrosion of the first sample according to rank.
Step S2: collect multiple second sample, carries out after sensitized treatment and intercrystalline corrosion detect to the second sample, according to the mass loss of unit area to the second sample divided rank;
Collect second sample of 5083 sheet alloys of multiple different size, different conditions, after sensitized treatment and intercrystalline corrosion detection are carried out to the second sample, according to mass loss to the second sample divided rank, the same mass loss rank evaluating the second sample with the mass loss of unit area, then judges the Susceptibility To Intergranular Corrosion of the second sample according to rank.
Step S3: in the microstructure of the microstructure of metallography microscope Microscopic observation through first sample of step S1 and the second sample through step S2, and obtain the fractograph of the correspondence of the first sample and the second sample respectively.
Step S4: the microstructure of observing multiple 5083 sheet alloys to be detected under metaloscope respectively, the fractograph that contrast step S3 obtains, judges the Susceptibility To Intergranular Corrosion rank of multiple 5083 sheet alloys to be detected.
5083 sheet alloy Susceptibility To Intergranular Corrosion rank decision methods provided by the invention, carry out intercrystalline corrosion detection to the first sample of 5083 sheet alloys of the different size collected, different conditions; Sensitized treatment and intercrystalline corrosion detection are carried out to the second sample of 5083 sheet alloys of the different size collected, different conditions; Finally obtain the fractograph of the first sample and the second sample, under metaloscope, observe the microstructure of multiple 5083 sheet alloys to be detected respectively, contrast the fractograph obtained, judge the Susceptibility To Intergranular Corrosion rank of multiple 5083 sheet alloys to be detected.5083 sheet alloy Susceptibility To Intergranular Corrosion rank decision methods provided by the invention, its Susceptibility To Intergranular Corrosion rank is judged by the microstructure of 5083 alloys to be detected observed under metaloscope and 5083 microstructure of the alloy collection of illustrative plates are carried out contrast, shorten the judgement cycle of 5083 sheet alloy Susceptibility To Intergranular Corrosion ranks, efficient and convenient.
Embodiment two
The invention provides in another embodiment, 5083 sheet alloy Susceptibility To Intergranular Corrosion rank decision methods in 5083 sheet alloy Susceptibility To Intergranular Corrosion rank decision methods in the present embodiment and embodiment one are similar, something in common is just repeated no more, has only introduced difference.
In the present embodiment, 5083 sheet alloy Susceptibility To Intergranular Corrosion rank decision methods, comprise the following steps:
Step S10: factory obtains the first sample from calendering.
Calendering factory obtains 5083 sheet alloy samples.
Step S20: collect multiple first sample, after carrying out intercrystalline corrosion detection to the first sample collected, according to the mass loss of unit area to the first sample divided rank;
Collect first sample of 5083 sheet alloys of multiple different size, different conditions, intercrystalline corrosion detection is carried out to the first sample collected, and evaluates the first sample Susceptibility To Intergranular Corrosion with the mass loss of unit area.Wherein, carrying out intercrystalline corrosion to the first sample collected is utilize the standard of ASTMG67 to carry out.
Particularly, the kind of the first sample is respectively: 5083H111,5083H321 and 5083H116 sheet alloy, and wherein, the different size of 5083H111,5083H321 and 5083H116 sheet alloy refers to table 1.
According to ASTMG67-99 " measuring the standard test method of the Susceptibility To Intergranular Corrosion of 5XXX line aluminium alloy ", with the mass loss of the unit area after Huey test evaluation material Susceptibility To Intergranular Corrosion, be then divided into level Four according to mass loss: mass loss is less than 15mg/cm
2for insensitive, 15 ~ 25mg/cm
2for the sensitivity that is situated between, 25 ~ 75mg/cm
2for sensitivity, be greater than 75mg/cm
2for heavy corrosion.Obtain the result of table 1.
Through observing, apparent, the first sample after intercrystalline corrosion detects only can obtain insensitive and these two ranks responsive that are situated between.
Table 1
Step S30:
From calendering, factory obtains the second sample.
Calendering factory obtains 5083 sheet alloy samples
Step S40: collect multiple second sample, carries out after sensitized treatment and intercrystalline corrosion detect to the second sample, according to the mass loss of unit area to the second sample divided rank;
Collect second sample of 5083 sheet alloys of multiple different size, different conditions, sensitized treatment is carried out to the second sample and intercrystalline corrosion detects, and evaluate the second sample Susceptibility To Intergranular Corrosion with the mass loss of unit area equally.
The kind of the second sample is respectively: 5083H111 and 5083H321 sheet alloy, and wherein, the different size of 5083H111 and 5083H321 sheet alloy refers to table 2.
Wherein, sensitized treatment for sample is heated to 180 degree, and is incubated 96 hours.The testing result of the second sample after sensitized treatment is as table 2.It should be noted that, the method for evaluation corrosion level and the identical of step S20 of the second sample of sensitized treatment.By table 2, apparent, through the second sample of sensitized treatment, obtain sensitivity and these two ranks of heavy corrosion of divided rank.Through step S20 and step S40, obtain the sample of four grades divided according to ASTMG67.
Table 2
Step S50: in the microstructure of the microstructure of metallography microscope Microscopic observation through first sample of step S20 and the second sample through step S40, and obtain the fractograph of the correspondence of the first sample and the second sample respectively.
Step S60: the microstructure of observing multiple 5083 sheet alloys to be detected under metaloscope respectively, the fractograph that contrast step S50 obtains, judges the Susceptibility To Intergranular Corrosion rank of multiple 5083 sheet alloys to be detected.
Respectively by the microstructure that metaloscope gets standard samples.
5083 sheet alloy Susceptibility To Intergranular Corrosion rank decision methods provided by the invention, by carrying out intercrystalline corrosion detection to the first sample, sensitized treatment and intercrystalline corrosion detection are carried out to the second sample, obtain the sample of four grades divided in ASTMG67 standard, the standard fractograph corresponding to 5083 sheet alloy, four Susceptibility To Intergranular Corrosion ranks is obtained at metallography microscope Microscopic observation, by by basis of microscopic observation to the microstructure of testing sample contrast with the standard fractograph of preparation, thus judge the Susceptibility To Intergranular Corrosion rank of testing sample, efficient and convenient.
" first ", " second " in the present invention etc. are in description and distinguish, and do not have other particular meaning.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and inventive features.
Claims (7)
1. 5083 sheet alloy Susceptibility To Intergranular Corrosion rank decision methods, is characterized in that, comprise the following steps:
Steps A: the first sample of 5083 sheet alloys collecting multiple different size, different conditions, after carrying out intercrystalline corrosion detection to described first sample collected, according to the mass loss of unit area to described first sample divided rank;
Step B: the second sample of 5083 sheet alloys collecting multiple different size, different conditions, carries out after sensitized treatment and intercrystalline corrosion detect to described second sample, according to the mass loss of unit area to described second sample divided rank;
Step C: in the microstructure of the microstructure of metallography microscope Microscopic observation through the first sample of described steps A and the second sample through step B, and obtain the fractograph of the correspondence of described first sample and described second sample respectively;
Step D: the microstructure of observing multiple 5083 sheet alloys to be detected under described metaloscope respectively, the described fractograph that contrast step C obtains, judges the Susceptibility To Intergranular Corrosion rank of multiple described 5083 sheet alloys to be detected.
2. 5083 sheet alloy Susceptibility To Intergranular Corrosion rank decision methods according to claim 1, it is characterized in that, in described steps A and described step B to carry out grade classification to described first sample collected and described second sample be utilize the standard of ASTMG67 to divide.
3. 5083 sheet alloy Susceptibility To Intergranular Corrosion rank decision methods according to claim 2, it is characterized in that, the first sample of the different conditions in described steps A is respectively the sample of 5083H111,5083H321 and 5083H116.
4. 5083 sheet alloy Susceptibility To Intergranular Corrosion rank decision methods according to claim 3, it is characterized in that, different types of second sample in described step B is respectively 5083H111 and 5083H321.
5. 5083 sheet alloy Susceptibility To Intergranular Corrosion rank decision methods according to claim 4, it is characterized in that, described sensitized treatment for described second sample is heated to 180 degree, and is incubated 96 hours.
6. 5083 sheet alloy Susceptibility To Intergranular Corrosion rank decision methods according to claim 5, is characterized in that, also comprise step D before described steps A:
From calendering, factory obtains described first sample.
7. 5083 sheet alloy Susceptibility To Intergranular Corrosion rank decision methods according to claim 6, is characterized in that, also comprise step e between described steps A and described step B:
Described second sample is obtained from described calendering factory.
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| CN108107052A (en) * | 2017-12-21 | 2018-06-01 | 西南铝业（集团）有限责任公司 | A kind of determination method of 5083 aluminium alloy Peeling Corrosion rank |
| CN112816400A (en) * | 2021-02-23 | 2021-05-18 | 东北大学 | Evaluation method for intercrystalline corrosion resistance of 5XXX series alloy |
| CN113607807A (en) * | 2021-08-06 | 2021-11-05 | 中国特种设备检测研究院 | Austenitic stainless steel sensitization damage test grading method and device |
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