Internal stress exists as an inherent force within electroplated and chemically applied metallic deposits. This induced stress can be tensile or compressive in nature, causing the deposit to contract or expand in relation to the base material. High levels of stress in deposits produce micro-cracking and macro-cracking, and in severe cases produce a lack of deposit adhesion in the form of blistering, peeling, and flaking. Two ways to evaluate the internal deposit stress in metallic coatings are the bent strip Deposit Stress Analyzer and the Spiral Contractometer systems. These represent two stress test procedures that have approval status by the American Society for Testing Metals Standards.
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The Deposit Stress Analyzer System ASTM Standard B975
This is a unique, reliable, accurate and economical method for testing the internal deposit stress exhibited in thin metallic coatings such as those deposited by electrolytic and electroless plating processes and electrocoated deposits. Testing using the Deposit Stress Analyzer is simple and requires a low capital investment. Test strips can be coated along with work being processed, or testing can be done by coating the test strips separately in a laboratory bench set-up with the deposit or coating being evaluated. Calculation of the internal deposit stress in pounds per square inch, whether tensile or compressive, can be easily determined.
The Deposit Stress Analyzer System can be used by most metal platers.
Some applications include:
Military zinc, tin and cadmium plated deposits Hard chrome plated deposits
Decorative nickel chrome plated deposits Electronics copper and nickel plated deposits
Precious metal plated deposits Electroless chemically deposited metallic layers
Engineered metal alloy plated deposits
The Spiral Contractometer System ASTM Standard B636
Our Spiral Contractometer offers the advantage of a new geometry to solve problems related to an exposed center rod that allows deposition of the applied deposit to occur on the inside of the spiral (helix). An interior deposit reversed the type of stress to a significant degree and on the inside of the spiral (helix). An interior deposit reverses the type of stress to a significant degree and calculates erroneous data much greater that is commonly realized so interior masking is very necessary. This design provides masking is sufficient for process control when using helices without an interior mask. Also, it enables helices to be plated tip to tip so the plated surface area is the same for every spiral (helix). Guessing the surface area is not necessary. Stainless steel inserts and 25% glass filled Teflon construction prevent thread damage.
The Advantages The Improvements
Accurate repeatable results Thread stripping is prevented
Easy centering of the Helix Reduced calibration wheel friction
Easy centering of the anode basket 25% glass filled Teflon construction
Holes at helix ends- no slippage Inside spiral surface is shielded
Simple and rapid calculations in English/ Metric Minimal deposit on helix interior
Guess steps are eliminated Precise scale to arrow view
*Ordering on this website is for USA only. We have Distributors in China, Europe, Hong Kong, Japan, Mexico, S. Korea, and Taiwan, see contact us page for information. All other countries may order from Specialty Testing and Development Company by e-mail, fax, or phone. A $50.00 wire fee will be added to all international orders paid by bank wire transfer.
PN: 785A Plating Cell with Flow Holes
$185.00Add to cart
Deposit Stress Analyzer
$185.00Add to cart
$11.00Add to cart
$275.00Add to cart
$30.00Add to cart
Test Strips: Copper Iron PN: 1194
$168.75Add to cart
Temperature Controller Prewired
$130.00Add to cart
Magnetic Stirrer/ Hot plate
$395.00Add to cart
Direct Current Power Sup. 0-2 amp
$130.00Add to cart
Spiral Contractometer Kit
$1,495.00Add to cart
Large Anode Basket
$345.00Add to cart
Adjustable Spiral Contractometer Support Stand
$205.00Add to cart
Spiral (Helix) Teflon Coated
$115.00Add to cart
Spirals (Helix)- Non-Coated
$70.00Add to cart
Test Strips: Pure Nickel PN: 270NI
$181.25Add to cart
Spiral Contractometer Wire Repair Kit
$5.00Add to cart
Anode Buttons, Nickel
$64.00Add to cart
In-Site 1 Plating Cell
$175.00Add to cart
PN: 785C Plating Cell (with out side flow holes)
$185.00Add to cart
PN: 785B Plating Cell PVC (with side flow holes)
$385.00Add to cart
PN: 800L Plating Cell Poly-carbonate (two compartment)
$310.00Add to cart
PN: 800PVC Plating Cell (Two compartment)
$490.00Add to cart
Test Strips: Nickel Iron PN: 2042B
HY-3006D Power Supply 0-6 amps
$200.00Add to cart
Specialty Testing and Development Company’s mission is to provide the global manufacturing industry with accurate and cost effective methods and equipment for testing stress in applied metallic coatings.
THE MATERIALS PROVIDED BY SPECIALTY TESTING AND DEVELOPMENT COMPANY ARE PROVIDED “AS IS” WITHOUT ANY EXPRESS OR IMPLIED WARRANTY OF ANY KIND INCLUDING WARRANTIES OF MERCHANT ABILITY, NON INFRINGEMENT OF INTELLECTUAL PROPERTY, OR FITNESS FOR ANY PARTICULAR PURPOSE. IN NO EVENT SHALL SPECIALTY TESTING AND DEVELOPMENT COMPANY OR ITS AGENTS OR OFFICERS BE LIABLE FOR ANY INDIRECT OR CONSEQUENTIAL DAMAGES WHATSOEVER (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF PROFITS, BUSINESS INTERRUPTION, AND THE LIKE) ARISING OUT OF THE USE OF OR INABILITY TO USE THE MATERIALS, EVEN IF SPECIALTY TESTING AND DEVELOPMENT COMPANY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
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