Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
GJB 150 consists of the following 28 parts under the general title Laboratory environmental test methods for military materiel:
a) Part 1: General requirements;
b) Part 2: Low pressure (altitude) test;
c) Part 3: High temperature test;
d) Part 4: Low temperature test;
e) Part 5: Temperature shock test;
f) Part 7: Solar radiation test;
g) Part 8: Rain test;
h) Part 9: Damp heat test;
i) Part 10: Fungus test;
j) Part 11: Salt fog test;
k) Part 12: Sand and dust test;
l) Part 13: Explosive atmosphere test;
m) Part 14: Immersion test;
n) Part 15: Acceleration test;
o) Part 16: Vibration test;
p) Part 17: Acoustic noise test;
q) Part 18: Shock test;
r) Part 20: Gunfire vibration test;
s) Part 21: Wind pressure test;
t) Part 22: Icing/freezing rain test;
u) Part 23: Motions and inclinations test;
v) Part 24: Temperature-humidity-vibration-altitude test;
w) Part 25: Vibro-acoustic/temperature test;
x) Part 26: Contamination by fluids test;
y) Part 27: Pyroshock test;
z) Part 28: Acidic atmosphere test;
aa) Part 29: Ballistic shock test;
bb) Part 30: Ship shock test.
This is Part 11 of GJB 150, which replaces GJB 150.11-1986 Environmental test methods for military equipments - Salt fog test.
The following main changes have been made with respect to GJB 150.11-1986:
a) the Clause “Test conditions" in GJB 150.11-1986 is deleted, and the calculation guidelines for determining test methods, test sequences, test procedures and test conditions are added;
b) the requirements for test information are added;
c) the test purpose is changed;
d) the test procedure is changed;
e) the sedimentation rate of salt solution in the test is changed;
f) the test control measures are added;
g) the test result analysis is added.
This part was proposed by the Electronic Information Base Department of the General Armaments Department of the PLA.
The previous edition of this part is as follows:
GJB 150.11-1986
Laboratory environmental test methods for military material - Part 11: Salt fog test
1 Scope
This part specifies the purpose and application, tailoring guidelines, information requirements, test requirements, test process and result analysis of salt fog test carried out in military materiel laboratory.
This part is applicable to salt fog test of military materiel.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this part. For dated reference, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this part. However parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references or references with version not indicated, the latest edition of the normative document referred to applies.
GJB 150.1A-2009 Laboratory environmental test methods for military materiel - Part 1: General requirements
GJB 4239 General requirements for materiel environmental engineering
3 Purpose and application
3.1 Purpose
This test is intended to:
a) determine the effectiveness of protective layer and decorative layer of materials;
b) determine the influence of salt sediments on the physical and electrical properties of materiel.
3.2 Application
This test is applicable to:
a) evaluation of the quality and effectiveness of protective coating and decorative layer of materiel and its materials, determination of potential problem areas, and detection of quality control defects and design defects;
b) materials optimization and materiel evaluation;
c) materiel mainly exposed to the atmosphere with high salt content.
3.3 Restriction
This test:
a) does not reproduce the influence of marine atmospheric environment, because the chemical composition and concentration of marine and other corrosive environments are different from those specified in this test;
b) cannot explain that there is a direct relationship between salt fog corrosion and corrosion caused by other media;
c) cannot prove that the materiel that has withstood this test can withstand corrosion in all corrosive environments;
d) has been proved that it is often unreliable to predict the service life of different materials and coatings;
e) cannot replace the evaluation of corrosion caused by damp heat and fungus;
f) is prevented to replace the test of components with the test of samples or test pieces.
4 Calculation guidelines
4.1 Selection of test methods
4.1.1 General
The requirements of relevant technical documents are analyzed and the results obtained from implementing GJB 4239 in the procuring process of materiel (product) are applied to determine the materiel life stage when atmospheric corrosion environment appears. Whether this test is necessary shall be determined according to the following environmental effects. When it is necessary to carry out this test through determination and the same test piece is used for this test and other environmental tests, the sequence of this test and other tests shall also be determined.
4.1.2 Environmental effects
4.1.2.1 Corrosion effect
Salt fog environment may cause the following corrosion effects on the materiel (product):
a) corrosion caused by electrochemical reaction;
b) accelerating stress corrosion;
c) formation of acidic or alkaline solution due to salt ionization in water.
4.1.2.2 Electrical effect
Salt fog environment may cause the following electrical effects on the materiel (product):
a) damage to electrical equipment caused by salt sediments;
b) generation of a conductive coating;
c) corrosion of insulating materials and metals.
4.1.2.3 Physical effect
Salt fog environment may cause the following physical effects on the materiel (product):
a) blocking or jamming of the moving parts of mechanical parts and components;
b) blistering of the coating due to electrolysis.
4.1.3 Selection of test sequence
4.1.3.1 General requirements
See GJB 150.1A-2009, 3.6.
4.1.3.2 Special requirements
In most cases, it is recommended to carry out salt fog test after other tests if the same test piece is used to complete various climate tests. Salt sediments may interfere with the effectiveness of other tests. Generally, the same test piece is not used for salt fog, fungus and damp heat tests, but if necessary, salt fog test shall be carried out after fungus and damp heat tests. In addition, the same test piece is generally not used for sand and dust test and salt fog test, but if necessary, sand and dust test shall be carried out after salt fog test.
4.2 Selection of test procedures
There is only one procedure in this test.
4.3 Determination of test conditions
4.3.1 General
After this test and corresponding procedure are selected, the test conditions and test technology used in such procedure shall also be selected according to the requirements of relevant documents and the information provided for such procedure. Test parameters such as concentration and pH value of salt solution, test duration, salt fog sedimentation rate, test temperature, etc., and technical status of test pieces shall be determined, and the contents of 4.3.2 to 4.3.7 shall be considered when determining these parameters.
Foreword i 1 Scope 2 Normative references 3 Purpose and application 3.1 Purpose 3.2 Application 3.3 Restriction 4 Calculation guidelines 4.1 Selection of test methods 4.2 Selection of test procedures 4.3 Determination of test conditions 5 Information requirements 5.1 Information required before test 5.2 Information required in the test 5.3 Information required after test 6 Test requirements 6.1 Test equipment 6.2 Test control 6.3 Test interruption 6.4 Installation and commissioning of test pieces 7 Test process 7.1 Test preparation 7.2 Test procedure 8 Result analysis
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
GJB 150 consists of the following 28 parts under the general title Laboratory environmental test methods for military materiel:
a) Part 1: General requirements;
b) Part 2: Low pressure (altitude) test;
c) Part 3: High temperature test;
d) Part 4: Low temperature test;
e) Part 5: Temperature shock test;
f) Part 7: Solar radiation test;
g) Part 8: Rain test;
h) Part 9: Damp heat test;
i) Part 10: Fungus test;
j) Part 11: Salt fog test;
k) Part 12: Sand and dust test;
l) Part 13: Explosive atmosphere test;
m) Part 14: Immersion test;
n) Part 15: Acceleration test;
o) Part 16: Vibration test;
p) Part 17: Acoustic noise test;
q) Part 18: Shock test;
r) Part 20: Gunfire vibration test;
s) Part 21: Wind pressure test;
t) Part 22: Icing/freezing rain test;
u) Part 23: Motions and inclinations test;
v) Part 24: Temperature-humidity-vibration-altitude test;
w) Part 25: Vibro-acoustic/temperature test;
x) Part 26: Contamination by fluids test;
y) Part 27: Pyroshock test;
z) Part 28: Acidic atmosphere test;
aa) Part 29: Ballistic shock test;
bb) Part 30: Ship shock test.
This is Part 11 of GJB 150, which replaces GJB 150.11-1986 Environmental test methods for military equipments - Salt fog test.
The following main changes have been made with respect to GJB 150.11-1986:
a) the Clause “Test conditions" in GJB 150.11-1986 is deleted, and the calculation guidelines for determining test methods, test sequences, test procedures and test conditions are added;
b) the requirements for test information are added;
c) the test purpose is changed;
d) the test procedure is changed;
e) the sedimentation rate of salt solution in the test is changed;
f) the test control measures are added;
g) the test result analysis is added.
This part was proposed by the Electronic Information Base Department of the General Armaments Department of the PLA.
The previous edition of this part is as follows:
GJB 150.11-1986
Laboratory environmental test methods for military material - Part 11: Salt fog test
1 Scope
This part specifies the purpose and application, tailoring guidelines, information requirements, test requirements, test process and result analysis of salt fog test carried out in military materiel laboratory.
This part is applicable to salt fog test of military materiel.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this part. For dated reference, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this part. However parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references or references with version not indicated, the latest edition of the normative document referred to applies.
GJB 150.1A-2009 Laboratory environmental test methods for military materiel - Part 1: General requirements
GJB 4239 General requirements for materiel environmental engineering
3 Purpose and application
3.1 Purpose
This test is intended to:
a) determine the effectiveness of protective layer and decorative layer of materials;
b) determine the influence of salt sediments on the physical and electrical properties of materiel.
3.2 Application
This test is applicable to:
a) evaluation of the quality and effectiveness of protective coating and decorative layer of materiel and its materials, determination of potential problem areas, and detection of quality control defects and design defects;
b) materials optimization and materiel evaluation;
c) materiel mainly exposed to the atmosphere with high salt content.
3.3 Restriction
This test:
a) does not reproduce the influence of marine atmospheric environment, because the chemical composition and concentration of marine and other corrosive environments are different from those specified in this test;
b) cannot explain that there is a direct relationship between salt fog corrosion and corrosion caused by other media;
c) cannot prove that the materiel that has withstood this test can withstand corrosion in all corrosive environments;
d) has been proved that it is often unreliable to predict the service life of different materials and coatings;
e) cannot replace the evaluation of corrosion caused by damp heat and fungus;
f) is prevented to replace the test of components with the test of samples or test pieces.
4 Calculation guidelines
4.1 Selection of test methods
4.1.1 General
The requirements of relevant technical documents are analyzed and the results obtained from implementing GJB 4239 in the procuring process of materiel (product) are applied to determine the materiel life stage when atmospheric corrosion environment appears. Whether this test is necessary shall be determined according to the following environmental effects. When it is necessary to carry out this test through determination and the same test piece is used for this test and other environmental tests, the sequence of this test and other tests shall also be determined.
4.1.2 Environmental effects
4.1.2.1 Corrosion effect
Salt fog environment may cause the following corrosion effects on the materiel (product):
a) corrosion caused by electrochemical reaction;
b) accelerating stress corrosion;
c) formation of acidic or alkaline solution due to salt ionization in water.
4.1.2.2 Electrical effect
Salt fog environment may cause the following electrical effects on the materiel (product):
a) damage to electrical equipment caused by salt sediments;
b) generation of a conductive coating;
c) corrosion of insulating materials and metals.
4.1.2.3 Physical effect
Salt fog environment may cause the following physical effects on the materiel (product):
a) blocking or jamming of the moving parts of mechanical parts and components;
b) blistering of the coating due to electrolysis.
4.1.3 Selection of test sequence
4.1.3.1 General requirements
See GJB 150.1A-2009, 3.6.
4.1.3.2 Special requirements
In most cases, it is recommended to carry out salt fog test after other tests if the same test piece is used to complete various climate tests. Salt sediments may interfere with the effectiveness of other tests. Generally, the same test piece is not used for salt fog, fungus and damp heat tests, but if necessary, salt fog test shall be carried out after fungus and damp heat tests. In addition, the same test piece is generally not used for sand and dust test and salt fog test, but if necessary, sand and dust test shall be carried out after salt fog test.
4.2 Selection of test procedures
There is only one procedure in this test.
4.3 Determination of test conditions
4.3.1 General
After this test and corresponding procedure are selected, the test conditions and test technology used in such procedure shall also be selected according to the requirements of relevant documents and the information provided for such procedure. Test parameters such as concentration and pH value of salt solution, test duration, salt fog sedimentation rate, test temperature, etc., and technical status of test pieces shall be determined, and the contents of 4.3.2 to 4.3.7 shall be considered when determining these parameters.
Contents of GJB 150.11A-2009
Foreword i
1 Scope
2 Normative references
3 Purpose and application
3.1 Purpose
3.2 Application
3.3 Restriction
4 Calculation guidelines
4.1 Selection of test methods
4.2 Selection of test procedures
4.3 Determination of test conditions
5 Information requirements
5.1 Information required before test
5.2 Information required in the test
5.3 Information required after test
6 Test requirements
6.1 Test equipment
6.2 Test control
6.3 Test interruption
6.4 Installation and commissioning of test pieces
7 Test process
7.1 Test preparation
7.2 Test procedure
8 Result analysis
