By visiting this site, you accept the use of cookies. More about our cookie policy.

GOST 25278.12-82

GOST 33729-2016 GOST 20996.3-2016 GOST 31921-2012 GOST 33730-2016 GOST 12342-2015 GOST 19738-2015 GOST 28595-2015 GOST 28058-2015 GOST 20996.11-2015 GOST 9816.5-2014 GOST 20996.12-2014 GOST 20996.7-2014 GOST P 56306-2014 GOST P 56308-2014 GOST 20996.1-2014 GOST 20996.2-2014 GOST 20996.0-2014 GOST 16273.1-2014 GOST 9816.0-2014 GOST 9816.4-2014 GOST P 56142-2014 STATE STANDARD P 54493-2011 GOST 13498-2010 STATE STANDARD P 54335-2011 GOST 13462-2010 STATE STANDARD P 54313-2011 GOST P 53372-2009 GOST P 53197-2008 GOST P 53196-2008 GOST P 52955-2008 GOST P 50429.9-92 GOST 6836-2002 GOST 6835-2002 GOST 18337-95 GOST 13637.9-93 GOST 13637.8-93 GOST 13637.7-93 GOST 13637.6-93 GOST 13637.5-93 GOST 13637.4-93 GOST 13637.3-93 GOST 13637.2-93 GOST 13637.1-93 GOST 13637.0-93 STATE STANDARD 13099-2006 GOST 13098-2006 GOST 10297-94 GOST 12562.1-82 GOST 12564.2-83 GOST 16321.2-70 GOST 4658-73 GOST 12227.1-76 GOST 16274.0-77 GOST 16274.1-77 GOST 22519.5-77 GOST 22720.4-77 GOST 22519.4-77 GOST 22720.2-77 GOST 22519.6-77 GOST 13462-79 GOST 23862.24-79 GOST 23862.35-79 GOST 23862.15-79 GOST 23862.29-79 GOST 24392-80 GOST 20997.5-81 GOST 24977.1-81 GOST 25278.8-82 GOST 20996.11-82 GOST 25278.5-82 GOST 1367.7-83 GOST 26239.9-84 GOST 26473.1-85 GOST 16273.1-85 GOST 26473.2-85 GOST 26473.6-85 GOST 25278.15-87 GOST 12223.1-76 GOST 12645.7-77 GOST 12645.1-77 GOST 12645.6-77 GOST 22720.3-77 GOST 12645.4-77 GOST 22519.7-77 GOST 22519.2-77 GOST 22519.0-77 GOST 12645.5-77 GOST 22517-77 GOST 12645.2-77 GOST 16274.9-77 GOST 16274.5-77 GOST 22720.0-77 GOST 22519.3-77 GOST 12560.1-78 GOST 12558.1-78 GOST 12561.2-78 GOST 12228.2-78 GOST 18385.4-79 GOST 23862.30-79 GOST 18385.3-79 GOST 23862.6-79 GOST 23862.0-79 GOST 23685-79 GOST 23862.31-79 GOST 23862.18-79 GOST 23862.7-79 GOST 23862.1-79 GOST 23862.20-79 GOST 23862.26-79 GOST 23862.23-79 GOST 23862.33-79 GOST 23862.10-79 GOST 23862.8-79 GOST 23862.2-79 GOST 23862.9-79 GOST 23862.12-79 GOST 23862.13-79 GOST 23862.14-79 GOST 12225-80 GOST 16099-80 GOST 16153-80 GOST 20997.2-81 GOST 20997.3-81 GOST 24977.2-81 GOST 24977.3-81 GOST 20996.4-82 GOST 14338.2-82 GOST 25278.10-82 GOST 20996.7-82 GOST 25278.4-82 GOST 12556.1-82 GOST 14339.1-82 GOST 25278.9-82 GOST 25278.1-82 GOST 20996.9-82 GOST 12554.1-83 GOST 1367.4-83 GOST 12555.1-83 GOST 1367.6-83 GOST 1367.3-83 GOST 1367.9-83 GOST 1367.10-83 GOST 12554.2-83 GOST 26239.4-84 GOST 9816.2-84 GOST 26473.9-85 GOST 26473.0-85 GOST 12645.11-86 GOST 12645.12-86 GOST 8775.3-87 GOST 27973.0-88 GOST 18904.8-89 GOST 18904.6-89 GOST 18385.0-89 GOST 14339.5-91 GOST 14339.3-91 GOST 29103-91 GOST 16321.1-70 GOST 16883.2-71 GOST 16882.1-71 GOST 12223.0-76 GOST 12552.2-77 GOST 12645.3-77 GOST 16274.2-77 GOST 16274.10-77 GOST 12552.1-77 GOST 22720.1-77 GOST 16274.4-77 GOST 16274.7-77 GOST 12228.1-78 GOST 12561.1-78 GOST 12558.2-78 GOST 12224.1-78 GOST 23862.22-79 GOST 23862.21-79 GOST 23687.2-79 GOST 23862.25-79 GOST 23862.19-79 GOST 23862.4-79 GOST 18385.1-79 GOST 23687.1-79 GOST 23862.34-79 GOST 23862.17-79 GOST 23862.27-79 GOST 17614-80 GOST 12340-81 GOST 31291-2005 GOST 20997.1-81 GOST 20997.4-81 GOST 20996.2-82 GOST 12551.2-82 GOST 12559.1-82 GOST 1089-82 GOST 12550.1-82 GOST 20996.5-82 GOST 20996.3-82 GOST 12550.2-82 GOST 20996.8-82 GOST 14338.4-82 GOST 25278.12-82 GOST 25278.11-82 GOST 12551.1-82 GOST 25278.3-82 GOST 20996.6-82 GOST 25278.6-82 GOST 14338.1-82 GOST 14339.4-82 GOST 20996.10-82 GOST 20996.1-82 GOST 12645.9-83 GOST 12563.2-83 GOST 19709.1-83 GOST 1367.11-83 GOST 1367.0-83 GOST 19709.2-83 GOST 12645.0-83 GOST 12555.2-83 GOST 1367.1-83 GOST 9816.3-84 GOST 9816.4-84 GOST 9816.1-84 GOST 9816.0-84 GOST 26468-85 GOST 26473.11-85 GOST 26473.12-85 GOST 26473.5-85 GOST 26473.7-85 GOST 16273.0-85 GOST 26473.3-85 GOST 26473.8-85 GOST 26473.13-85 GOST 25278.13-87 GOST 25278.14-87 GOST 8775.1-87 GOST 25278.17-87 GOST 18904.1-89 GOST 18904.0-89 STATE STANDARD P 51572-2000 GOST 14316-91 GOST P 51704-2001 GOST 16883.1-71 GOST 16882.2-71 GOST 16883.3-71 GOST 8774-75 GOST 12227.0-76 GOST 12797-77 GOST 16274.3-77 GOST 12553.1-77 GOST 12553.2-77 GOST 16274.6-77 GOST 22519.1-77 GOST 16274.8-77 GOST 12560.2-78 GOST 23862.11-79 GOST 23862.36-79 GOST 23862.3-79 GOST 23862.5-79 GOST 18385.2-79 GOST 23862.28-79 GOST 16100-79 GOST 23862.16-79 GOST 23862.32-79 GOST 20997.0-81 GOST 14339.2-82 GOST 12562.2-82 GOST 25278.7-82 GOST 20996.12-82 GOST 12645.8-82 GOST 20996.0-82 GOST 12556.2-82 GOST 25278.2-82 GOST 12564.1-83 GOST 1367.5-83 GOST 25948-83 GOST 1367.8-83 GOST 1367.2-83 GOST 12563.1-83 GOST 9816.5-84 GOST 26473.4-85 GOST 26473.10-85 GOST 12645.10-86 GOST 8775.2-87 GOST 25278.16-87 GOST 8775.0-87 GOST 8775.4-87 GOST 12645.13-87 GOST 27973.3-88 GOST 27973.1-88 GOST 27973.2-88 GOST 18385.6-89 GOST 18385.7-89 GOST 28058-89 GOST 18385.5-89 GOST 10928-90 GOST 14338.3-91 GOST 10298-79 GOST P 51784-2001 GOST 15527-2004 GOST 28595-90 GOST 28353.1-89 GOST 28353.0-89 GOST 28353.2-89 GOST 28353.3-89 STATE STANDARD P 52599-2006

GOST 25278.12−82 Alloys and alloys of rare metals. Spectral method for determination of silicon, iron, aluminum, manganese and chromium in alloys based on vanadium (Change No. 1)


GOST 25278.12−82

Group B59

STATE STANDARD OF THE USSR

ALLOYS AND ALLOYS OF RARE METALS

Spectral method for determination of silicon, iron, aluminum, manganese and chromium in alloys based on vanadium

Alloys and foundry alloys of rare metals. Spectral method for determination of silicon, iron, aluminium, manganese and chromium in alloys on vanadium base


AXTU 1709

Valid from 01.07.83
to 01.07.93*
_______________________________
* Expiration removed
according to the Protocol of the Intergovernmental Council
for standardization, Metrology and certification
(IUS N 2, 1993). — Note the manufacturer’s database.



INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the Ministry of nonferrous metallurgy of the USSR

PERFORMERS

Yu. A. Karpov, E. G. Nembrini, V. G., Miscreants, G. N. Andrianov, E. S. Danilin, M. A. Desyatkova L. I. Kirsanova, T. M. Malyutina, Y. F. Markov, V. M. Mikhailov, L. A. Nikitina, L. G. Obruchkova, N. Rasnitsyn, N. Suvorova, L. N. Filimonov

2. APPROVED AND put INTO EFFECT by Decision of the USSR State Committee for standards from 26.05.82 N 2120

3. The period of examination — 1993

The frequency of inspection — 5 years

4. INTRODUCED FOR THE FIRST TIME

5. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

   
The designation of the reference document referenced Section number, paragraph
GOST 3773−72
Sec. 2
GOST 4173−77 Sec. 2
GOST 9428−73 Sec. 2
GOST 10691.1−84 Sec. 2
GOST 26473.0−85
1.1
GOST 27068−86
Sec. 2

6. The validity of the standard extended until 01.01.93 by the Resolution of Gosstandart of the USSR from 29.10.87 N 4096

7. REPRINT (November 1988) with amendment No. 1, approved in October 1987 (ICS 1−88).


This standard specifies the spectral method for determination of silicon, iron, manganese and chromium (from 0.02 to 1%), aluminum (0.1 to 1%) in alloys and master alloys based on vanadium (components: tungsten not more than 10%, molybdenum not more than 10%, titanium not more than 15%, zirconium not more than 5%).

Method is based on the intensity of spectral lines of silicon, iron, aluminum, manganese and chromium from their mass fraction in the sample with the excitation spectrum in the arc DC.

1. GENERAL REQUIREMENTS

1.1. General requirements for methods of analysis and security requirements — according to GOST 26473.0−85.

(Changed edition, Rev. N 1).

2. APPARATUS, MATERIALS AND REAGENTS


The diffraction spectrograph DFS-8 with the grating 600 gr/mm (complete installation with a universal tripod) or similar device.

A constant current source, providing power not less than 260 V and a current not less than 20 A.

Muffle furnace with thermostat, providing a temperature of 800−900 °C.

Microphotometer MF-2 or similar device.

Cup platinum.

Analytical scale type ADV-200 or similar type.

Libra torsion bar type W-500.

Spectromancer of PS-18 or similar type.

A device for sharpening graphite electrodes.

Mortar and pestle made of organic glass.

Box of organic glass.

Electrodes graphite high purity-7−3 6 mm in diameter, with a spherical recess in the end face (the radius of the sphere is 5 mm, depth 1 mm) and sharpened on the convex hemisphere with a radius of 5 mm, annealed in the arc of direct current at 10 A for 7 s.

Vaseline cosmetic or similar, clean silicon, iron, aluminum, manganese and chromium at the level of 5·10ГОСТ 25278.12-82 Сплавы и лигатуры редких металлов. Спектральный метод определения кремния, железа, алюминия, марганца и хрома в сплавах на основе ванадия (с Изменением N 1)% by weight.

Plate: organic glass size 6х20 cm for mixing of the sample with vaseline.

Stands made of plexiglass and wood for the electrodes with the sample.

Measurer-plate 4 mm thick with drilled hole 5 mm in diameter.

Spectral photographic plates 9x12 type 2, feelings. 15 units or equivalent, providing normal blackening of analytical lines.

Vanadium pentoxide spectral-net.

Iron oxide according to GOST 4173−77, h.d. a.

Silicon dioxide according to GOST 9428−73, h. d. a.

Aluminium oxide, C. D. and.

Ammonium chloride according to GOST 3773−72.

Sodium Chernovetskiy according to GOST 27068−86.

Manganese dioxide, H. h

Chromium oxide, h.d. a.

The technical rectified ethyl alcohol according to GOST 18300−72.

The developer according to GOST 10691.1−84.

Fixer: 300 g chernovetskogo sodium, 20 g of ammonium chloride dissolved respectively in 200 and 700 GMГОСТ 25278.12-82 Сплавы и лигатуры редких металлов. Спектральный метод определения кремния, железа, алюминия, марганца и хрома в сплавах на основе ванадия (с Изменением N 1)of water, poured the resulting solutions together and the total volume was adjusted with water to 1 DMГОСТ 25278.12-82 Сплавы и лигатуры редких металлов. Спектральный метод определения кремния, железа, алюминия, марганца и хрома в сплавах на основе ванадия (с Изменением N 1).
________________
* The text matches the original. — Note the manufacturer’s database.

Stopwatch.

Tracing.

Wool.

Spatula.

The scalpel.

A pair of tweezers.

Lamp infrared ikz-500 with voltage regulator type RNO-250−0,5 or controller of the same type.

(Changed edition, Rev. N 1).

3. PREPARATION FOR ASSAY

3.1. Preparation of a primary reference sample (OOS) containing 5% of silicon, iron, aluminum, manganese and chromium.

References are prepared on the basis of representing a pure vanadium pentoxide (at a total content of alloying components in the alloy up to 8%) or an artificial mixture of oxides simulating the composition of the analyzed alloy (base).

1,3400 g bases, 0,1069 g of silicon dioxide, 0,0715 g of iron oxide, 0,0945 g of aluminium oxide, 0,0790 g of manganese dioxide, 0,0730 g of chromium oxide is ground in a mortar made of organic glass under a layer of alcohol (30 cmГОСТ 25278.12-82 Сплавы и лигатуры редких металлов. Спектральный метод определения кремния, железа, алюминия, марганца и хрома в сплавах на основе ванадия (с Изменением N 1)) for 1.5−2 h. the Mixture is dried under an infrared lamp to constant weight. Before taking batches oxides calcined at 400 °C to constant weight.

A lot of portions weighed in the balance, with a spatula, pour in the packet of tracing paper. Spatula, boat weights, mortar is rubbed with cotton wool moistened with alcohol. To prepare packet tracing paper cut with a scalpel.

(Changed edition, Rev. N 1).

3.2. Sample preparation comparison (OS) serial dilution of the primary reference sample, and then each subsequent sample basis.

The mass fraction of each of the designated impurities in the reference sample (percentages, based on the metal content of a mixture of metals) and the mass added to the mixture in batches of basics and diluted sample are shown in table.1.

The mixture is ground in a mortar under a layer of alcohol (30 cmГОСТ 25278.12-82 Сплавы и лигатуры редких металлов. Спектральный метод определения кремния, железа, алюминия, марганца и хрома в сплавах на основе ванадия (с Изменением N 1)) for 1.5−2 h and dried under an infrared lamp.

The comparison samples stored in plastic jars with lids from polyethylene.

Table 1

       
The designation of a working reference sample Mass fraction of impurities silicon, iron, aluminum, manganese, chromium, % The mass of test portions, g

    the basics

dilute sample
OC1
1,0
1,4960
0,3740 (EP)
OC2
0,5
1,0000
1,0000 (OS-1)
ОС3
0,2
Are 1.1100
Of 0.7400 (OS-2)
ОС4
0,1
1,0000
1,0000 (OS-3)
ОС5
0,05
1,0000
1,000 (OS-4)
ОС6
0,02
0,6000
0,4000 (OS-5)



(Changed edition, Rev. N 1).

4. ANALYSIS


A portion of the sample weighing 0.5 g was placed in a platinum Cup and calcined in a muffle until constant weight at a temperature of 850 °C.

Taken from the muffle furnace a Cup of oxidized melt is cooled in air, wetting the melt 10 cmГОСТ 25278.12-82 Сплавы и лигатуры редких металлов. Спектральный метод определения кремния, железа, алюминия, марганца и хрома в сплавах на основе ванадия (с Изменением N 1)of alcohol. Slightly deforming the walls of the Cup, remove the melt and thoroughly mix it with 10 cmГОСТ 25278.12-82 Сплавы и лигатуры редких металлов. Спектральный метод определения кремния, железа, алюминия, марганца и хрома в сплавах на основе ванадия (с Изменением N 1)of ethanol in a mortar made of organic glass. The mixture is dried under an infrared lamp to constant weight. Weighed on a torsion balance, 5 mg of prepared sample and mix it with vaseline, taken using the measuring device, on a glass plate with a spatula. The resulting mixture is applied with a spatula on a three-electrode with a spherical recess at the end.

The electrode with the sample installed in the lower tripod holder with tweezers. In the upper holder set carbon electrode, sharpened to a convex hemisphere. The index of the scale of the wavelength of the spectrograph is mounted so that a part of the spectrum around 290 nm was in the middle of the spectrogram. In the intermediate condenser set aperture of 5 mm. Between the electrodes ignite the DC arc, and photographing spectra of each pair of electrodes on the spectrograph, using the being system of the slit illumination.

The arc current is maintained at (15±0,5) A.

The interelectrode distance is 3 mm, exposure time of each spectrum was 30 s. the same operations are performed with samples of comparison spectra being photographed on the same photographic plate. The spectrum of each test sample (or each sample comparison) photographed three times.

(Changed edition, Rev. N 1).

5. PROCESSING OF THE RESULTS

5.1. Each of the obtained spectrograms with photoretrieval find the blackening of analytical lines of impurities (ГОСТ 25278.12-82 Сплавы и лигатуры редких металлов. Спектральный метод определения кремния, железа, алюминия, марганца и хрома в сплавах на основе ванадия (с Изменением N 1)) and compare (ГОСТ 25278.12-82 Сплавы и лигатуры редких металлов. Спектральный метод определения кремния, железа, алюминия, марганца и хрома в сплавах на основе ванадия (с Изменением N 1)) (table.2) and calculate the difference pucherani ГОСТ 25278.12-82 Сплавы и лигатуры редких металлов. Спектральный метод определения кремния, железа, алюминия, марганца и хрома в сплавах на основе ванадия (с Изменением N 1). On three values ГОСТ 25278.12-82 Сплавы и лигатуры редких металлов. Спектральный метод определения кремния, железа, алюминия, марганца и хрома в сплавах на основе ванадия (с Изменением N 1), ГОСТ 25278.12-82 Сплавы и лигатуры редких металлов. Спектральный метод определения кремния, железа, алюминия, марганца и хрома в сплавах на основе ванадия (с Изменением N 1), ГОСТ 25278.12-82 Сплавы и лигатуры редких металлов. Спектральный метод определения кремния, железа, алюминия, марганца и хрома в сплавах на основе ванадия (с Изменением N 1)obtained three spectrograms taken for each sample, find the arithmetic mean (ГОСТ 25278.12-82 Сплавы и лигатуры редких металлов. Спектральный метод определения кремния, железа, алюминия, марганца и хрома в сплавах на основе ванадия (с Изменением N 1)).

The results of electrophoretic spectra of comparison samples to build calibration graphs in the coordinate ГОСТ 25278.12-82 Сплавы и лигатуры редких металлов. Спектральный метод определения кремния, железа, алюминия, марганца и хрома в сплавах на основе ванадия (с Изменением N 1), where ГОСТ 25278.12-82 Сплавы и лигатуры редких металлов. Спектральный метод определения кремния, железа, алюминия, марганца и хрома в сплавах на основе ванадия (с Изменением N 1)is the logarithm of the mass fraction of the element in the reference sample.

Table 2

       
The analytical line of the designated element
The analytical line of element comparisons
Item
Wavelength, nm
Item
Wavelength, nm
Silicon
251,92
Vanadium
252,03
Iron
259,84
Vanadium
252,03
Aluminium
257,51
Vanadium
257,65
Chrome
269,84
Vanadium
269,47
Manganese
259,29
Vanadium
259,22



Mass fraction of silicon, iron, aluminum, chromium and manganese in alloy find the results of electrophoretic spectra using the calibration graphs.

(Changed edition, Rev. N 1).

5.2. Discrepancies between the results of the three definitions (the difference between larger and smaller) and the results of the two tests should not exceed the values of permissible differences given in table.3.

Table 3

     
The designated element
Mass fraction, %
The allowable divergence, %
Silicon
0,02 0,01
  0,10
0,05
  1,0
0,4
Iron
0,02
0,01
  0,10
0,05
  1,0
0,4
Aluminium
0,10
0,03
  0,5
0,2
  1,0
0,4
Chrome
0,02
0,01
  0,10
0,05
  1,0
0,4
Manganese
0,02
0,01
  0,10
0,05
  1,0
0,4



(Changed edition, Rev. N 1).

5.3. Check the value of control experience

To check the value of the reference experiment six carbon electrodes cause mixed with vaseline the basis of the analyzed alloy and photographed spectra according to claim 4. In the resulting spectrograms photometric density pucherani analytical lines of silicon, iron, aluminum, chromium and manganese (see table.2). The difference pucherani (ГОСТ 25278.12-82 Сплавы и лигатуры редких металлов. Спектральный метод определения кремния, железа, алюминия, марганца и хрома в сплавах на основе ванадия (с Изменением N 1)) should not exceed 0.02 units pochernenija (background is measured in the shorter wavelengths of the analytical lines).

(Changed edition, Rev. N 1).