NEN EN 13811 : 2003

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 General requirements
  4.1 Zinc dust
  4.2 Information to be supplied by the purchaser
5 Sampling
6 Coating requirement
  6.1 Thickness
  6.2 Test methods
  6.3 General
  6.4 Reference areas
  6.5 Magnetic method
  6.6 Gravimetric method
7 Certificate of conformity
Annex A (normative) Information to be supplied by the purchaser
        to the sherardizer
      A.1 Essential information
      A.2 Additional information
Annex B (informative) Determination of thickness
      B.1 General
      B.2 Microscopic cross-section method
      B.3 Calculation of thickness from mass per unit area
          (reference method)
Annex C (informative) General information
      C.1 Sherardizing process
      C.2 Basis material
      C.3 Appearance
      C.4 Adhesion
      C.5 After-treatments
      C.6 Coating thickness
      C.7 Additional clearances for threaded fasteners
Bibliography

Describes minimum thickness requirements for three classes of zinc coating applied to ferrous products by the sherardizing process for the purpose of protection against corrosion and abrasion.