Automotive Parts and Materials Corrosion Test Methods
This standard revises JASO M 609 (Corrosion Test Methods for Automotive Materials) and JASO M 610 (Test Methods for Automotive Parts Appearance Corrosion) by reclassifying the test types for appearance corrosion and pitting corrosion in order to improve correlation with the actual corrosion conditions of automobiles in the market.
The standard specifies a method for determining the corrosion resistance (exterior corrosion and pitting corrosion) of steel materials used for automobiles and automotive parts and materials made of steel materials with surface treatment on the base material by a combined cycle test.
The test has been split into two new methods, covering two applications
- Apperance Corrosion – Cycle Method A or B
- Perforated Corrosion – Cycle Method C
The test method consists of repeatedly exposing the specimens to salt water, dry and wet atmospheres under specified conditions, and evaluating the appearance corrosion of parts and materials, pitting corrosion in mating parts, etc. The test is performed by repeatedly exposing the specimens to salt water, dry and wet atmospheres in sequence.
Test Method B has been split into two test applications
- Salt Spray Method (salt atomisation)
- Salt Shower Method (overhead oscillating salt spray)
Here we discuss the 2nd application for Salt Shower Method
Method B Salt Spray Method Test Conditions
| Method B |
Function |
Duration |
Transistion included in duration |
| 1 |
Salt Spray 50℃ +/-1℃ |
15 mins |
1 hour |
| 2 |
Drying 60℃ +/-1℃ & 50 %RH±5 ％RH |
8 hours |
30 min |
| 3 |
Wetting 50℃ +/-1℃ & 95 %RH or above |
4 hours |
1 hour |
| 4 |
Drying 60℃ +/-1℃ & 50 %RH±5 ％RH |
7h 45mins |
30 min |
| 5 |
Wetting 50℃ +/-1℃ & 95 %RH or above |
4 hours |
30 min back to step 1 |
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Fallout After a 5-minute saltwater shower collection at a rate of 15 ml to 75 ml/5 min/80 cm² |
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This test is also referred to as a Cyclic Corrosion Test, often abbreviated to CCT.
<!– To select an Ascott chamber suitable for this test click here –>
Automotive Parts and Materials Corrosion Test Methods
This standard revises JASO M 609 (Corrosion Test Methods for Automotive Materials) and JASO M 610 (Test Methods for Automotive Parts Appearance Corrosion) by reclassifying the test types for appearance corrosion and pitting corrosion in order to improve correlation with the actual corrosion conditions of automobiles in the market.
The standard specifies a method for determining the corrosion resistance (exterior corrosion and pitting corrosion) of steel materials used for automobiles and automotive parts and materials made of steel materials with surface treatment on the base material by a combined cycle test.
The test has been split into two new methods, covering two applications
- Apperance Corrosion – Cycle Method A or B
- Perforated Corrosion – Cycle Method C
The test method consists of repeatedly exposing the specimens to salt water, dry and wet atmospheres under specified conditions, and evaluating the appearance corrosion of parts and materials, pitting corrosion in mating parts, etc. The test is performed by repeatedly exposing the specimens to salt water, dry and wet atmospheres in sequence.
Test Method B has been split into two test applications
- Salt Spray Method (salt atomisation)
- Salt Shower Method (overhead oscillating salt spray)
Here we discuss the 1st application for Salt Spray Method
Method B Salt Spray Method Test Conditions
| Method B |
Function |
Duration |
Transistion included in duration |
| 1 |
Salt Spray 50℃ +/-1℃ |
1 hour |
1 hour |
| 2 |
Drying 60℃ +/-1℃ & 50 %RH±5 ％RH |
8 hours |
30 min |
| 3 |
Wetting 50℃ +/-1℃ & 95 %RH or above |
4 hours |
1 hour |
| 4 |
Drying 60℃ +/-1℃ & 50 %RH±5 ％RH |
7 hours |
30 min |
| 5 |
Wetting 50℃ +/-1℃ & 95 %RH or above |
4 hours |
30 min back to step 1 |
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Fallout requirement is 1-2ml per 80cm² per hour |
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Chamber volumes of less than 400 Litres are not permitted by this test standard.
This test is also referred to as a Cyclic Corrosion Test, often abbreviated to CCT.
<!– To select an Ascott chamber suitable for this test click here –>
Automotive Parts and Materials Corrosion Test Methods
This standard revises JASO M 609 (Corrosion Test Methods for Automotive Materials) and JASO M 610 (Test Methods for Automotive Parts Appearance Corrosion) by reclassifying the test types for appearance corrosion and pitting corrosion in order to improve correlation with the actual corrosion conditions of automobiles in the market.
The standard specifies a method for determining the corrosion resistance (exterior corrosion and pitting corrosion) of steel materials used for automobiles and automotive parts and materials made of steel materials with surface treatment on the base material by a combined cycle test.
The test has been split into two new methods, covering two applications
- Apperance Corrosion – Cycle Method A or B
- Perforated Corrosion – Cycle Method C
The test method consists of repeatedly exposing the specimens to salt water, dry and wet atmospheres under specified conditions, and evaluating the appearance corrosion of parts and materials, pitting corrosion in mating parts, etc. The test is performed by repeatedly exposing the specimens to salt water, dry and wet atmospheres in sequence.
Method A Test Conditions
| Method A |
Function |
Duration |
Transistion included in duration |
| 1 |
Salt Spray 50℃ +/-2℃ |
10 min |
30 min |
| 2 |
Drying 60℃ +/-2℃ & Less than 30%RH |
2h 35min |
30 min |
| 3 |
Wetting 60℃ +/-2℃ &95 %RH±5 ％RH |
1h 15 min |
30 min |
| 4 |
Drying 60℃ +/-2℃ & Less than 30%RH |
2h 40min |
30 min |
| 5 |
Wetting 60℃ +/-2℃ & 95 %RH±5 ％RH |
1h 20 min |
10 min back to step 1 |
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Repeat steps 4&5 for 5 times before starting cycle again |
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Fallout requirement is 1-2ml per 80cm² per hour |
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Chamber volumes of less than 400 Litres are not permitted by this test standard.
This test is also referred to as a Cyclic Corrosion Test, often abbreviated to CCT.
<!– To select an Ascott chamber suitable for this test click here –>
Cyclic corrosion testing of materials & components in automotive construction.
The purpose of this test is to provide an accelerated test procedure for the assessment of the corrosion behaviour of components and of the corrosion protection provided by coating systems. The test method is based on real corrosive conditions and delivers differentiated results for a large number of uses in automotive applications
Test specimens are placed in an enclosed chamber, and positioned at an angle of 65° to 75° to the horizontal with the side to be tested uppermost. The salt spray phase is performed with a 1% solution of sodium chloride, (pH 6.5 to 7.2) and falls out onto the specimens at a rate of 2.0 to 4.0ml/80cm²/hour.
A full test cycle lasts 7 days and consists of:
Cycles A,B & C are multi step cycles consisting of varying degrees of temperature from -15°C to +50°C and humidity values of between 50% and 95%.
The typical test duration is six full test cycles. (6 Weeks)
This standard is the ISO equivalent of DIN 55635 & VDA 233-102
Accelerated corrosion test, version II (ACT II) – Cyclic atmospheric corrosion test with salt load
Volvo and Scania also Refer to this test as STD 423-0069
This test procedure serves as a general purpose atmospheric corrosion test and can be applied to a wide variety of materials, coatings and interactions of materials. It has been developed to allow the evaluation of the corrosion resistance of metals in environments where there is a significant influence of chloride ions, mainly as sodium chloride from a marine source or by winter road de-icing salt. This test is cyclic in nature, i.e.; test specimens are exposed to changing climates over time.
Test specimens are placed in an enclosed chamber and exposed to a changing climate. The first 5 days comprise of the following 3 part repeating cycle. 6.0 hours exposure to a ‘wet’ climate of no less than 95% RH, at +25°C, with intermittent exposure to salt solution. This is followed by 2.5 hours climate controlled transition to 50°C & 70% RH. This is followed by 15.5 hours exposure to a constant climate of 50°C & 70% RH. The final 2 days comprise of 48.0 hours exposure to a constant climate of 50°C & 70% RH. This completes the total 7 day test cycle. The number of cycle repeats and therefore the test duration is variable.
This test is also referred to as a Cyclic Corrosion Test, often abbreviated to CCT.
For further information on Volvo STD standards visit; volvogroup.com/suppliers
Cyclic corrosion testing of materials & components in automotive construction.
The purpose of this test is to provide an accelerated test procedure for the assessment of the corrosion behaviour of components and of the corrosion protection provided by coating systems. The test method is based on real corrosive conditions and delivers differentiated results for a large number of uses in automotive applications
Test specimens are placed in an enclosed chamber, and positioned at an angle of 65° to 75° to the horizontal with the side to be tested uppermost. The salt spray phase is performed with a 1% solution of sodium chloride, (pH 6.5 to 7.2) and falls out onto the specimens at a rate of 2.0 to 4.0ml/80cm²/hour.
A full test cycle lasts 7 days and consists of:
Cycles A,B & C are multi step cycles consisting of varying degrees of temperature from -15°C to +50°C and humidity values of between 50% and 95%.
The typical test duration is six full test cycles. (6 Weeks)
and is available to purchase from Beuth Publishing by clicking here
The VW Volkswagen PV 1078 Test Specification defines the assessment criteria for the corrosion resistance of surface-protected, Corrosive highly stressed chassis components based on iron materials, especially low-alloy steels, solid (e.g. subframes, wishbones, cross struts).
Its a two part test, a combination as follows:
- INKA Component Test
- Step 1 Dry phase @ 40°C/40%RH for 4 hours
- Step 2 Salt Spray Phase @ 35°C for 0.5 hours
- Step 3 Wetting Phase @ 40°C/95%RH for 7.5 hours
- Step 4 Dry phase @ 40°C/40%RH for 4 hours
- Step 5 Controlled Humidity @ 50°C/80%RH for 8 hours
- Alternating Climate Test in accordance with PV 1200 (+80°C/-40°C)
- Limit temperatures: 80°C and -40°C
- Holding time at limit temperature: 4 h
- Heating-up and cooling-down times: 2 h
- Relative humidity at 80°C/80%RH
Both the above tests can be ran in a single Ascott chamber
1 cycle lasts one week and is divided as follows:
A: A: B: B: A: A: A, where:
A = INKA component test,
B = storage according to PV 1200.
The start of the test is always “A” with 5 consecutive days.
The test duration for subframes and cavity-forming chassis parts is 6 cycles (this corresponds to 6 weeks).
this is a VW Volkswagen / Audi Test Standard. Also see PV 1209 & PV 1200.
Hyundai/Kia CCT-D
An accelerated corrosion test under complex environment shall be performed in accordance with CCT-D of MS600-66
Step 1: Salt Dipping (Immersion) @ 50°C for 2 hours
Step 2: Wetting @ 50°C / 95%RH for 8 hours
Step 3: Drying @ 70°C / 30%RH for 1.5 hours
Step 4: Drying @ 70°C / 15%RH for 1.5 hours
Step 5: Wetting @ 35°C / 100%RH for 6.5 hours
Step 6: Drying @ 35°C / 15%RH for 2 hours
Step 7: Salt Spray @ 35°C / 95%RH for 30 minutes
Step 8: Freezing @ -20°C for 20 minutes
Transition times:
From step 1 to step 2 = 30 minutes
From step 2 to step 3 = 20 minutes
From step 3 to step 4 = 20 minutes
From step 4 to step 5 = 50 minutes
From Step 5 to step 6 = 50 minutes
From Step 6 to step 7 = 20 minutes
From Step 7 to step 8 = 60 minutes
From Step 8 to step 1 = 20 minutes
The entire cycle is 24 hours and repeatable
Hyundai/Kia CCT-C
An accelerated corrosion test under complex environment shall be performed in accordance with CCT-C of MS600-66
Step 1: Salt Dipping (Immersion) @ 40°C for 4 hours
Step 2: Drying @ 70°C / 30%RH for 2 hours
Step 3: Wetting @ 50°C / 95%RH for 2 hours
Step 4: Natural Drying @ 25°C / 60%RH for 1.5 hours
Step 5: Freezing @ -20°C for 2.5 hours
Transition times:
From step 1 to step 2 = 30 minutes
From step 2 to step 3 = 20 minutes
From step 3 to step 4 = 20 minutes
From step 4 to step 5 = 60 minutes
From Step 5 to step 1 = 20 minutes
The entire cycle is 12 hours and repeatable
Mazda MES MN 601G Test Method for Paint Film
Section 27 for this test standard discusses the 5 class requirements for corrosion testing
Class 1 – Salt Spray Test
Class 2 – Perforation Corrosion Resistance Test
Class 3 – Scratch Corrosion Resistance Test
Class 4 – Edge Corrosion Resistance Test
Class 5 – Filiform Corrosion Resistance Test
Class 2 OR Class 3 can be tested to MAZDA MCT-2M which requires a fully enclosed chamber to perform the following test steps:
- 6 hour Salt Spray @ 35°C in accordance with JIS Z 2371
- 3 hours Drying @ 50°C / 20-40%RH
- 14 Hour wetting @ 50°C / 95% RH
- 1 hour standard ambient temperature
The test profile runs for 24 hours
For Class 2 testing this should be ran for 120 cycles
For Class 3 testing this should be ran for 60 cycles
This test can be ran in an Ascott Cyclic Chamber fitted with some accessories