Cerakote is a Polymer-Ceramic Composite coating that can be applied to HP MJF Printed Parts. The unique formulation used for Cerakote ceramic coating enhances a number of physical performance properties including abrasion/wear resistance, corrosion resistance, chemical resistance, impact strength, and hardness. Each of these properties is rigorously tested to guarantee that Cerakote products remain at the forefront of the ceramic coatings market. Cerakote ceramic coatings utilize state-of-the-art technology to out-perform any competitive coating in both laboratory settings and real world applications.
We use the H series Cerakote product and aim for between .0005″ – .001″ in coating thickness. In coating industry terms, we are trying to apply a layer that is 1 mil thick. How thick is one mil? An average credit card is 30 mils thick. One mil is 1/30th of the thickness of a credit card!
Here is a great explanation of the mil unit of measurement from Cerakote:
At F3DP we have found this coating to be a viable long term solution for coating parts that will be used in a end use or production application. Another reason we like this coating technology is that like us, NIC Industries (the creators of Cerakote) like to test their product and stand behind their claims:
Taber Abrasion is a test using a weighted abrasive wheel that rotates at a constant speed to determine the resistance of finishes to abrasion and wear, as stated by test standard ASTM D4060. Seven competitive finishes including Cerakote® H-146 Graphite Black were tested in accordance with ASTM D4060. Each finish was tested three separate times in order to validate the test result. Panel weights and mil thickness were measured prior to the start of each test to determine a wear rating. A 1000 gram weight was placed on CS-17 Taber Abrasion wheels as required by ASTM testing standards for testing fifinishes. Panels were cycled until the Taber wheel wore through the finish to the steel substrate. Finishes that required more than 500 cycles to wear through to the substrate were stopped every 500 cycles for the Taber abrasion wheels to be cleaned. Cleaning the Taber wheels every 500 cycles is a requirement to ensure accurate results. Once the Taber wheel has
breached the finish, the Taber abrader is stopped and a final weight is taken to determine the wear rating for each finish. Wear ratings are calculated by taking the weight of the test panel before abrasion and subtracting the weight of the test panel after abrasion and multiplying that by 1,000. That number is then divided by the number of cycles completed before the finish was worn through. The resulting number is the specified wear rating for that finish. Based on ASTM testing standard D4060, Cerakote® Finished Strong by lasting nearly twice as long as the nearest competitive finish and 24 times as long as the furthest competitive finish.
Impact Resistance (ASTM D2794) measures the resistance of organic coatings to the effects of rapid deformation (Impact). Impact resistance is measured by placing a coated panel in an universal impact tester. A standard weight is dropped a distance to strike an indenter that deforms the coating and the substrate. The indentation can be either an intrusion or an extrusion. By gradually increasing the distance the weight drops,
(2 inches at a time) the point at which failure occurs can be determined by cracking or delamination of the coating. All Cerakote Elite and nearly every Cerakote H Series have an impact strength measuring 160 in-lbs., which is the maximum the impact tester can measure.
Cerakote’s chemical resistance was analyzed using a variety of solvents under extreme conditions. Coated panels were submerged in a solution for a period of 24 hours. Samples were then removed, analyzed and assigned a rating based on the average color change across all solvents tested. The results of this test are shown in the table below.
The performance of Cerakote Elite was classified as excellent for the below 13 chemical compound tests. Excellent indicates that the coating was not affected following a 24-hour immersion in the chemical compounds. Cerakote H Series also performed well, only experiencing a slight change in two of the tests after a 24-hour immersion.
Please note, not all 3D printing materials are comparable with the chemicals tested in the table below. Please consult with F3DP or check our chemical comparability testing page for more info.
If adding HP MJF Cerakote to your 3D Printed parts expect an additional lead time of 2-3 days on top of quoted printing time. Cost for a single part painted in HP MJF Cerakote varies based on size but generally is between $100 – $300. If a larger quantity of parts need to be painted the per part cost is decreased. For production volumes (50+ parts) per unit pricing usually ranges from $10 – $20 each, as the volume goes up from 50 parts the price per unit will continue to drop.
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