Tel.: 8615989623158
E-mail: sales@grandetop.com
Tel.: 8615989623158
E-mail: sales@grandetop.com
Cyclic corrosion testing provides the best possible laboratory simulation of natural atmospheric corrosion. Research indicates that test results are similar to outdoors in resulting structure, morphology, and relative corrosion rates.
G-FOG cyclic corrosion chambers from GRANDETOP® can run traditional salt spray, Prohesion, and most cyclic automotive tests. G-FOG chambers are available in different sizes to fulfill a wide range of testing requirements.
G-FOG cyclic corrosion testers are the simplest, most reliable, and easiest to use corrosion testers available.
Overview
Cyclic Corrosion Testing
Prior to cyclic corrosion testing, conventional salt spray (a continuous salt spray at 35˚C), was the standard way to simulate corrosion in a lab. Because conventional salt spray methods failed to mimic the natural wet/dry cycles of the outdoors, test results frequently provided poor correlation to outdoors.
In a G-FOG cyclic corrosion tester, specimens are exposed to a series of different environments in a repetitive cycle that mimics the outdoors. Simple cycles, such as Prohesion, may consist of cycling between salt fog and dry conditions. More sophisticated automotive methods may call for multi-step cycles that incorporate humidity or condensation, along with salt spray and dry-off.
Within one G-FOG 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 G-FOG controller.
G-FOG corrosion test chambers are available in two types. Model GSSP performs traditional salt spray and Prohesion tests. Model GCCT performs salt spray, Prohesion, and 100% humidity for most cyclic automotive tests.
Easy Programming and Sample Mounting
The G-FOG test chamber is designed to cycle between four conditions: Fog, Dry-Off, 100% Humidity (Model GCCT only), and Dwell. Test conditions, time, and temperature are controlled by a built-in microprocessor. A remarkably simple user interface allows for easy user programming and operation. The operator can quickly create new cycles, or run any of the programmed cycles. The G-FOG controller includes complete self-diagnostics, including warning messages, routine service reminders and safety shut down.
The G-FOG tester has a low belt line and an easy opening lid for easy sample mounting. The GSSP-600 and GCCT-600 models have a capacity of about 160 test panels of 75mm x 150mm in size. The GSSP-1100 and GCCT-1100 models have a capacity of 240 test panels.
Precise Control of Fog Dispersion
The G-FOG 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 spray atomizer, while the air pressure regulator controls the distance of the “throw.” Note that purified water is required for proper operation of G-FOG corrosion testers.
Internal Solution Reservoir
Space utilization is maximized and maintenance is minimized with the G-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 salt filter and a built-in alarm to alert the operator when the solution is low.
Fast Cycling
G-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.
Affordable
G-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.
Models (also see Features Tab)
· G-FOG GSSP-600: conventional salt spray and Prohesion tests, 640 liter chamber volume
· G-FOG GSSP-1100: conventional salt spray and Prohesion tests, 1103 liter chamber volume
· G-FOG GCCT-600: conventional salt spray, Prohesion, and 100% humidity, 640 liter chamber volume
· G-FOG GCCT-1100: conventional salt spray, Prohesion, and 100% humidity, 1103 liter chamber volume
Features
Model GSSP for Prohesion or Conventional Salt Spray Tests
Numerous accelerated corrosion tests may be performed in G-FOG GSSP corrosion tester including Prohesion, ASTM B117 and G85, BS 3900 F4 & F9, DIN 50.021 and ISO 9227.
The Prohesion test uses fast cycling, rapid temperature changes, a low humidity dry-off cycle and a different corrosive solution to provide a more realistic test. Many researchers have found this test useful for industrial maintenance coatings.
Continuous salt spray exposures are widely specified for testing components and coatings for corrosion resistance. Applications include plated and painted finishes, aerospace and military components, and electrical/electronic systems.
Most of these tests are performed to particular specifications such as ASTM B117 (Salt Spray), and BS 3900 F4. These tests are widely used for relative corrosion testing. They are typically run at an elevated temperature and do not incorporate a dry-off cycle. They require heated, humidified air for the spray.
Model GCCT for Corrosion Research and Cyclic Automotive Tests
The G-FOG model GCCT has all the advantages of the model GSSP, but adds the flexibility of including 100% humidity.
Today’s automotive corrosion test methods typically call for exposing specimens to a repetitive cycle of salt spray, high humidity, low humidity dry-off, and ambient conditions. These test methods were originally developed as labor intensive manual procedures. The multi-functional G-FOG GCCT corrosion tester is designed to perform these cyclic tests automatically in a single chamber.
G-FOG model GCCT advantages include the elimination of:
· manual moving of test specimens from one chamber to another
· laborious spraying of test specimens
· variability in results from excessive specimen handling
Model GCCT 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.
Accessories
Specimen Holders
Optional test panel holders are available which allow the user to mount specimens at a 15 degree angle, holding panels up to 102mm x 304mm on 38mm centers.
Odd shaped parts (e.g. large three-dimensional specimens), can be mounted on special 20mm hanging rods.
· G-FOG GSSP-600 or GCCT-600 Test Panel Holder Kit, set of 8
· G-FOG GSSP-1100 or GCCT-1100 Test Panel Holder Kit, set of 10
· G-FOG GSSP-600 or GCCT-600 20mm (3/4”) Hanging Rod Kit, set of 6
· G-FOG GSSP-1100 or GCCT-1100 20mm (3/4”) Hanging Rod Kit, set of 8
Other Accessories
GRANDE offers a fog collection kit for the G-FOG tester, which consists of a set of six graduated cylinders, o-rings, and collection funnels.
Also available is a one-year maintenance parts kit, which consists of eight pump tubes, one air filter, two solution filters elements, and a handy hex wrench.
TEST STANDARDS FOR THE G-FOG CYCLIC CORROSION TESTER
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.
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.
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.
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.
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.
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.
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.
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.
Standard Guide for Testing Industrial Protective Coatings
This guide covers the selection and use of test methods and procedures for testing industrial protective coatings.
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.
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
Test KB. Salt Mist, Cyclic (Sodium Chloride Solution)
See ISO 60068-2-52
Methods of Test For Paints - Part F12: Determination of Resistance to Neutral Salt Spray (FOG)
See ISO 7253
Methods For Corrosion Testing of Metallic Coatings Part 1: Neutral Salt Spray Test (NSS TEST)
See ISO 9227
Method For Salt Spray Corrosion Tests in Artificial Atmospheres
See ISO 9227
Condensation Water Tests Atmospheres
See ISO 6270
Salt Spray Testing
See ISO 9227
Global Laboratory Accelerated Cyclic Corrosion Test
This standard specifies an accelerated laboratory atmospheric corrosion test.
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.
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.
Condensing Water Vapor Test
This procedure is used to evaluate the effects of a condensing water atmosphere on treated panels.
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).
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.
Salt Spray Test
Water Fog Humidity Test
This standard covers the requirements for testing water resistance of coated specimens in saturated water fog conditions.
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.
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.
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.
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.
General Test Methods For Plating
This standard specifies general test methods for plating.
General Test Methods For Coating
This procedure describes a salt spray test.
General Test Methods For Coating
This procedure describes a filiform corrosion test.
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.
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.
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.
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.
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.
Corrosion Tests in Artificial Atmospheres - Salt Spray Tests
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.
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).
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.
Test Mode for Corrosion Resistance Test
This procedure describes a salt spray test.
Test Mode for Corrosion Resistance Test
This procedure describes a salt spray test.
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.
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.
Corrosion Preventive Compound, Underbody Vehicle Corrosion Protection
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.
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.
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.
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.
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.
