Customer wants to fasten HDG strut to concrete walls. Environment is corrosive / saline (Florida)
For KH-EZ, would SS316 or CRC be the better choice?
For lighter loads, customer can use Kwik-con+ in SS410 - is that compatible with zinc platted brackets?
Hi Robert,
Thank you for reaching out.
Generally, when it comes to selecting an appropriate material for an application, consideration must be given to environmental conditions as well as corrosion due to dissimilar metals. A useful reference is Hilti’s Corrosion Handbook, where Section 5.1 lists different coatings/materials and their environmental conditions. Based on this table, SS316 has higher corrosive resistance than the CRC coating against environmental factors, though Section 5.13 of ESR-3056 for the KH-EZ in Masonry (and Section 5.17 of ESR-3027 for Concrete) states that both the KH-EZ SS316 and the KH-EZ CRC are permitted for exterior exposure and damp environments.
While SS410 has moderate corrosion resistance, SS316 has higher corrosion resistance against environmental factors (such as marine environments) due to SS316 having higher concentrations of Nickel and the inclusion of Molybdenum.
Comparison of the metals for contact/galvanic corrosion will also need to be evaluated by the Engineer of Record as they ultimately decide which anchor is most suitable for their application.
I hope this helps! Please reach out to hnatechnicalservices@hilti.com with any additional questions.
Kind regards,
Mia