Cyclic Corrosion Testing

The Q-FOG model CRH represents a true breakthrough in the price-performance ratio of corrosion testers with RH control. It can perform most major automotive corrosion test standards, such as GMW 14872, SAE J2334, and many others from Ford, ISO, GB/T, VW, Volvo, Chrysler, Renault, JASO, and others. The tester has all the features and advantages required in cyclic corrosion testers as well as full variable humidity control through the use of an innovative air pre-conditioner. Additionally, the CRH model includes a Shower Function that can be used interchangeably with traditional salt fog. With the Shower Function, spray droplets are much bigger, flow rates are much higher, and shower times are much shorter than the traditional atomized mist in the Salt Fog Function.The Shower function is available in a configuration mounted in the center, or as an overhead swaying shower bar to meet the mandatory language in some key corrosion tests. The CRH tester features an advanced cleaning feature for spray nozzles that prevents the clogging frequently found in competitive chambers. Within one Q-FOG CRH chamber, it is possible to cycle through a series of the most significant corrosion environments. Even extremely complex test cycles can easily be programmed with the Q-FOG controller. See LF-8131 – Standards Met by Q-FOG Testers or visit our standards page for a detailed list of test methods met by the Q-FOG CRH chamber.

Models

• Q-FOG CRH600-HSC (or 1100-HSC): conventional salt fog and Prohesion tests, humidity control, fixed shower module, 640 liter (or 1103 liter) chamber volume
• Q-FOG CRH600-HSCR (or 1100-HSCR): conventional salt fog and Prohesion tests, humidity control, fixed shower module, fast temperature and relative humidity transitions, 640 liter (or 1103 liter) chamber volume
• Q-FOG CRH1100-HTC: conventional salt fog and Prohesion tests, humidity control, overhead swaying shower bar, 1103 liter chamber volume
• Q-FOG CRH1100-HTCR: conventional salt fog and Prohesion tests, humidity control, overhead swaying shower bar, fast temperature and relative humidity transitions, 1103 liter chamber volume

See LF-8110 – Q-FOG Specifications for comparative information, or see the Features Tab.

RH and Shower Functions
The Q-FOG model CRH can ramp to and maintain a defined RH value and temperature through the use of an air pre-conditioner, a blower module, and special atomizing humidification nozzles. DI water is required for proper operation. 

The Shower Function in the Q-FOG CRH is used for some automotive test specifications. A user-adjustable volume of solution is uniformly sprayed onto specimens through specially positioned spray nozzles.  The Shower Function offers the following advantages:

• Nozzles are mounted to a spray bar, which can be easily removed when using the Fog Function
• Spray droplets are much bigger, flow rates are much higher, and shower times are much shorter than the atomized solution mist in the Fog Function
• Shower on/off times can be directly programmed to allow for excellent control of corrosion rates

Precise Control of Fog Dispersion
The Q-FOG CRH cyclic corrosion chamber has superior fog dispersion compared to conventional systems, which cannot vary volume and distance independently.  A variable speed peristaltic pump controls the amount of corrosive solution delivered to the fog atomizer, while the air pressure regulator controls the distance of the “throw.”  Note that purified water is required for proper operation of Q-FOG corrosion testers.

Internal Solution Reservoir
Space utilization is maximized and maintenance is minimized with the Q-FOG tester’s internal solution reservoir. The 120 liter reservoir has enough capacity for running most tests for 7 days or more. The reservoir has an integral particulate filter and a built-in alarm to alert the operator when the solution is low.

Fast Cycling
Q-FOG testers can change temperatures exceptionally fast because of their unique internal chamber heater and their high volume cooling/dry-off blower. An additional air heater allows very low humidity dry-off exposures. Conventional chambers with water jackets cannot cycle rapidly because of the thermal mass of the water, nor can they produce low humidity.

If fast heating or dry-off conditions are required, as prescribed in test standards ISO 11997 and automotive CCT type tests, the CRH model can be configured with Rapid Ramp Heaters. This newly- designed heater system enables quick temperature and relative humidity transition in a fully- loaded chamber. The optional Rapid Ramp Heater configuration enables transition times to be achieved in a full chamber and those demanding automotive test standards to be met unconditionally.

Calibration
The Q-FOG CRH tester’s chamber temperature and RH sensors should be calibrated by the user every six months to ensure accurate and consistent results.

Calibrating the temperature and RH sensors takes only a few minutes. It requires simple tools, a calibrated reference thermometer, and an insulated container.

Easy Programming and Sample Mounting
Test conditions, time, and temperature are controlled by a built-in microprocessor.  A remarkably simple user interface allows for easy programming and operation.  The operator can quickly create new cycles, or run any of the programmed cycles.  The Q-FOG controller includes complete self-diagnostics, including warning messages, routine service reminders, and safety shut down.

Model CRH units come equipped with a viewing window in the side of the lid and an internal light to allow easy monitoring of the test conditions.

Q-FOG testers have a low belt line and an easy-opening lid for easy sample mounting.  The 600 model has a capacity of 160 test panels of 75 x 150 mm in size.  The 1100 model has a capacity of 240 test panels.

Affordable
Q-FOG cyclic corrosion testers offer state of the art corrosion testing technology, reliability, ease of operation, and easy maintenance – all at a remarkably affordable price.

Specimen Holders
Standard test panel racks are available to accommodate flat specimens, such as Q-PANEL standard substrates. Racks can support up to 113 kg (250 pounds) each, and are slotted at 15 degrees from vertical. The 600 liter model can accommodate up to 160 specimens, 75 x 150 mm (3 x 6 in) in size, through 8 racks. The 1100 liter model can hold up to 240 specimens, using 10 racks.

Odd shaped parts (e.g. large, three-dimensional specimens) can be mounted on special 20 mm hanging rods.

For extremely large or heavy three-dimensional objects (such as metal wheel rims, engine parts, etc.), a rack-level or diffusion-level grate kit may be used. The Q-FOG tester’s sturdy construction can support a well-distributed total load of up to 544 kg (1200 pounds), ensuring compatibility with even the heaviest of automotive and other components.

See our specimen mounting page, LF-8151 – Q-FOG Specimen Mounting, or inquire about the following common part numbers:

• F-9008-K    Test Panel Holder Kit for 600 L Chambers, set of 8
• F-9011-K    Test Panel Holder Kit for 1100 L Chambers, set of 10
• F-9014-K    Hanging Rod Kit for 600 L Chambers, 20 mm (3/4 in), set of 6
• F-9017-K    Hanging Rod Kit for 1100 L Chambers, 20 mm (3/4 in) , set of 8
• F-8290        Specimen Mounting Grate for 600 L Chambers, Rack Level
• F-8284        Specimen Mounting Grate for 1100 L Chambers, Rack Level
• F-9220-X    CRH Corrosion Coupon Rack Kit

Other Accessories
Q-Lab offers a fog collection kit for the Q-FOG tester, which consists of a set of six graduated cylinders, o-rings, and collection funnels.  Fog collection is required by some tests.

A convenient salt kit is available, containing a pre-measured and certified quantity of NaCl (530 g) which allows for compatibility with ASTM B117. Just add the recommended amount of water to obtain a 5% solution.

Also available are a preventive maintenance parts kit and a nozzle cleaning kit.  These give users everything they need for the first full year of operation.

See our specimen mounting page, LF-8151 – Q-FOG Specimen Mounting, or inquire about the following common part numbers:

• F-9001-K    Fog Collection Kit, Contains 6 graduated cylinders and collection funnels
• F-9155-K    Start-Up Salt Kit; Contains pre-measured, certified NaCl
• F-9125-K    CRH Preventive Maintenance Kit, 1 year supply of parts
• F-8064-K    CRH Nozzle Cleaning Kit, 1 year supply of vinegar, 8 extra nozzles

• Brochure
• Specification

TEST STANDARDS FOR THE Q-FOG CYCLIC CORROSION TESTER

ASTM B117

Standard Practice for Operating Salt Spray (Fog) Apparatus

This practice provides a controlled corrosive environment which has been utilized to produce relative corrosion resistance information for specimens of metals and coated metals exposed in a given test chamber.

ASTM D1654

Voluntary Specification, Performance Requirements and Test Procedures for High Performance Organic Coatings on Aluminum Extrustions and Panels

This specification describes test procedures and performance requirements for high performance organic coatings applied to aluminum extrusions and panels for architectural products.

ASTM D1735

Standard Practice for Testing Water Resistance of Coatings Using Water Fog Apparatus

This practice covers the basic principles and operating procedures for testing water resistance of coatings in an apparatus similar to that used for salt spray testing.

ASTM D2247

Standard Practice for Testing Water Resistance of Coatings in 100% Relative Humidity

This practice covers the basic principles and operating procedures for testing water resistance of coatings by exposing coated specimens in an atmosphere maintained at 100% relative humidity so that condensation forms on the test specimens.

ASTM D2803

Standard Guide for Testing Filiform Corrosion Resistance of Organic Coatings on Metal

This guide covers three procedures for determining the susceptibility of organic-coated metal substrates to formation of filiform corrosion.

ASTM D3451

Standard Guide for Testing Coating Powders and Powder Coatings

This guide covers the selection and use of procedures for testing coating powders and powder coatings. The test methods included are listed in Table 1. Where more than one test method is listed for the same characteristic, no attempt is made to indicate superiority of one method over another. Selection of the methods to be followed must be governed by experience and the requirements in each individual case, together with agreement between the purchaser and the seller.

ASTM D4585

Standard Practice for Testing Water Resistance of Coatings Using Controlled Condensation

This practice covers basic principles and operating procedures for testing water resistance of coatings using controlled condensation.

ASTM D5894

Standard Practice for Cyclic Salt Fog/UV Exposure of Painted Metal, (Alternating Exposures in a Fog/Dry Cabinet and a UV/Condensation Cabinet)

This practice covers basic principles and operating practice for cyclic corrosion/UV exposure of paints on metal; using alternating periods of exposure in two different cabinets: a cycling salt fog/dry cabinet, and a fluorescent UV/condensation cabinet.

ASTM D6577

Standard Guide for Testing Industrial Protective Coatings

This guide covers the selection and use of test methods and procedures for testing industrial protective coatings.

ASTM D6675

Standard Practice for Salt-Accelerated Outdoor Cosmetic Corrosion Testing of Organic Coatings on Automotive Sheet Steel

This practice is designed to assist procedures to be followed when conducting outdoor exposures to evaluate cosmetic corrosion that might occur in steel panels covered with an organic coating that has been damaged.

ASTM G85

Standard Practice for Modified Salt Spray (Fog) Testing

This practice covers and sets forth conditions for five modifications in salt spray (fog) testing for specification purposes.

BS 2011 Pt2.1 Ka

Test KA Salt Mist

See ISO 60068-2-11

BS 2011 Pt2.1 Kb

Test KB. Salt Mist, Cyclic (Sodium Chloride Solution)

See ISO 60068-2-52

BS 3900 F12

Methods of Test For Paints – Part F12: Determination of Resistance to Neutral Salt Spray (FOG)

See ISO 7253

BS 5466 1

Methods For Corrosion Testing of Metallic Coatings Part 1: Neutral Salt Spray Test (NSS TEST)

See ISO 9227

BS 7479

Method For Salt Spray Corrosion Tests in Artificial Atmospheres

See ISO 9227

DIN 50017

Condensation Water Tests Atmospheres

See ISO 6270

DIN 50021

Salt Spray Testing

See ISO 9227

Ford CETP 00.00-L-467

Global Laboratory Accelerated Cyclic Corrosion Test

This standard specifies an accelerated laboratory atmospheric corrosion test.

Ford FLTM BI 103-01

Salt Spray Resistance Test for Painted Panels and Parts

This method is used to test the resistance to salt spray of painted panels and parts.

Ford FLTM BI 104-01

Water Immersion Test for Painted Parts and Panels

This method is used to determine the resistance to failure of painted metal and painted plastic parts and representative test panels when immersed in water.

Ford FLTM BI 104-02

Condensing Water Vapor Test

This procedure is used to evaluate the effects of a condensing water atmosphere on treated panels.

Ford FLTM BI 123-03

Component Corrosion Test

This test procedure is used to evaluate the corrosion performance of coatings applied to components. It is designed to simulate the corrosive conditions of the Arizona Proving Ground (APG) Vehicle Accelerated Corrosion Test (CETP 00.00-R-311).

Ford FLTM BQ 105-01

Copper-Accelerated Acetic Acid-Salt Spray Testing (CASS Test)

This procedure is used to determine the corrosion resistance primarily of stainless steel and plated parts. With respect to plated parts, it is used primarily for copper/nickel/chromium and nickel/chromium electroplated parts.

GB 5938

corrosion-resistant testing method of the metal deposits and conversion coatings for the light industrial products Neutral salt spraying test (NSS)

This standard applies to the inspection of the corrosion resistance of metal coatings and chemically treated layers.

GB/T 10125

Corrosion tests in artificial atmospheres-salt spray tests

This standard specifies the equipment, reagents and methods used for neutral salt spray (NSS), acetate salt spray (AASS), and copper-accelerated acetate salt spray (CASS) tests.

GB/T 1771

Paints and varnishes-determination of resistance to neutral salt spray (fog)

This standard specifies the method for determining the resistance of coatings to neutral salt spray.

GB/T 20853

Corrosion of metals and alloys-Corrosion in artificial atmosphere-Accelerated corrosion test involving exposure under controlled conditions of humidity cycling and intermittent spraying of a salt solution

This standard specifies the test method for the corrosion resistance of metals in the presence of chloride ions. Chloride ions are mainly sodium chloride from marine and highway deicing salts.

GB/T 20854

Corrosion of metals and alloys-Accelerated testing involving cyclic exposure to salt mist, “dry” and “wet” condition

This standard specifies the instruments and test methods for accelerated corrosion tests used to evaluate the corrosion resistance of metal materials used in outdoor salt-contaminated environments, regardless of whether the material being tested has permanent or temporary corrosion protection. This standard specifies the conditions for cyclic exposure of samples to neutral salt spray, “dry” and “wet” test environments.

GM 4298P

Salt Spray Test

GM 4465P

Water Fog Humidity Test

This standard covers the requirements for testing water resistance of coated specimens in saturated water fog conditions.

GM 9540P

Accelerated Corrosion Test

This procedure describes an accelerated laboratory corrosion test method to evaluate assemblies and components. The test procedure provides a combination of cyclic conditions (salt solution, various temperatures, humidity, and ambient environment) to accelerate metallic corrosion.

GMW 14729 (Option A)

Procedures For High Humidity Test

This procedure describes two options (water fog and wet-bottom) of high humidity testing which are typically used to evaluate the influence of high humidity environments to coated substrates. This influence is usually measured by testing physical and mechanical properties before and after exposure.

GMW 14872

Cyclic Corrosion Laboratory Test

This procedure describes an accelerated laboratory corrosion test method to evaluate assemblies and components. The test procedure provides a combination of cyclic conditions (salt solution, various temperatures, humidity, and ambient environment) to accelerate metallic corrosion.

GMW 3286

Neutral Salt Spray (NSS) Test

The neutral salt spray test is typically used to evaluate the corrosion resistance of metallic substrates and the corrosion preventative properties of coatings.

Honda HES D6001 sec 4.3

General Test Methods For Plating

This standard specifies general test methods for plating.

Honda HES D6501 sec 3.15.1

General Test Methods For Coating

This procedure describes a salt spray test.

Honda HES D6501 sec 3.15.2

General Test Methods For Coating

This procedure describes a filiform corrosion test.

IEC 60068-2-11

Basic Environmental Testing Procedures, Part 2: Test KA: Salt Mist

This test is to be applied to compare the resistance to deterioration from salt mist of specimens of similar construction. It is useful for evaluating the quality and the uniformity of protective coatings.

ISO 16701

Corrosion of Metals and Alloys – Corrosion in Artificial Atmosphere – Accelerated Corrosion Test Involving Exposure Under Controlled Conditions of Humidity Cycling and Intermittent Spraying of Salt Solution

This International Standard defines an accelerated corrosion test method to be used in assessing 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 from road de-icing salt.

ISO 60082-2-52

Environmental Testing – Part 2: Tests – Test KB. Salt Mist Cyclic (Sodium Chloride Solution)

Specifies a test for components or equipment designed to withstand a salt-laden atmosphere. To be read in conjunction with BS EN 60068-1:1995.

ISO 6270-2

Paints And Varnishes – Determination of Resistance to Humidity – Part 2: Procedure For Exposing Test Specimens in Condensation- Water Atmospheres

This part of ISO 6270 describes the general conditions and procedures which need to be observed when testing coated test specimens in constant condensation-water atmospheres or in alternating condensation water atmospheres.

ISO 7253

Paints and Varnishes- Determination of resistance to neutral salt spray (fog)

This International Standard is one of a series of standards dealing with the sampling and testing of paints, varnishes and related products.

ISO 9227

Corrosion Tests in Artificial Atmospheres – Salt Spray Tests

JIS H8502 Se. 7.3

Methods of Corrosion Resistance Test for Metallic Coatings

This standard specifies the methods of corrosion resistance testing for the metallic coatings and products coated with metal.

JIS Z2371 Sect. 7.2.3

Methods of Salt Spray Testing

This Japanese Industrial Standard specifies the required apparatus, reagent, technique or acceptance criteria when testing the corrosion resistance of metallic materials, or of those electroplated or treated with inorganic or organic films by the methods of neutral salt spray test (NSS), acetic acid salt spray test (AASS), or CASS test (CASS).

Mazda MES MN601

Test Method for Paint Films

This MES specifies a test method for coating films applied to automotive parts for the main purpose of corrosion prevention and ornamentation.

Mazda MES MN601, MCT-2M

Test Mode for Corrosion Resistance Test

This procedure describes a salt spray test.

Mazda MES MN601, MCT-3M

Test Mode for Corrosion Resistance Test

This procedure describes a salt spray test.

MIL-STD-202 (101E)

Test Method Standard: Electronic and Electrical Component Parts

The salt-spray test, in which specimens are subjected to a fine mist of salt solution, has several useful purposes when utilized with full recognition of its deficiencies and limitations.

Renault ECC1 – D17 2028

Corrosion Test by Automatic Phase Change Salt Spray Humidity and Drying

This test method is intended to describe a cycle of the cyclic corrosion test 1 (Essai de Corrosion Cyclique 1: ECC1) on the associated equipment and the verifications which are necessary to make sure that the test is in conformity.

SAE J1959

Corrosion Preventive Compound, Underbody Vehicle Corrosion Protection

SAE J2334

Laboratory Cyclic Corrosion Test

The SAE J2334 lab test procedure should be used when determining corrosion performance for a particular coating system, substrate, process, or design. Since it is a field-correlated test, it can be used as a validation tool as well as a development tool. If corrosion mechanisms other than cosmetic or general corrosion are to be examined using this test, field correlation must be established.

T/CSAE 71

Cyclic corrosion test methods of automotive assemblies and materials

This standard specifies the cyclic corrosion test methods for automotive parts and materials.

Toyota TSH 1555G

Test Method For Accelerated Corrosion Under Complex Environment

This standard covers the test method for reproduction, at an accelerated pace, of corrosion on each part of a vehicle body, in order to simulate the corrosion produced on actual vehicles.

Volvo STD 1027,1375

Accelerated Atmospheric Corrosion Testing – Volvo Indoor Corrosion Test (VICT)

This standard concerns determination of atmospheric corrosion resistance in an accelerated test. The test method has been developed to simulate the corrosion processes that take place on vehicles in a road environment where sodium chloride constitutes a dominating corrosive component.

Volvo STD 423-0014

Accelerated Corrosion Test

This standard defines an accelerated corrosion test method to be used in assessing 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 deicing salt.

Volvo VCS 1027-14

Accelerated Corrosion Test

This standard defines an accelerated corrosion test method to be used in assessing 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 deicing salt.

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