{"id":4283,"date":"2026-07-15T07:54:56","date_gmt":"2026-07-15T05:54:56","guid":{"rendered":"https:\/\/deltar.it\/nichelatura-chimica-medio-fosforo\/"},"modified":"2026-09-08T11:27:02","modified_gmt":"2026-09-08T09:27:02","slug":"medium-phosphorus-electroless-nickel-plating","status":"publish","type":"page","link":"https:\/\/deltar.it\/en\/medium-phosphorus-electroless-nickel-plating\/","title":{"rendered":"Medium-phosphorus electroless nickel plating (ENP 79)"},"content":{"rendered":"
[vc_row full_width=”stretch_row_content” content_placement=”bottom” full_height=”yes” columns_placement=”bottom” equal_height=”yes” wpex_bg_color=”accent-alt” el_class=”dt-container dt-inner-banner” css=”.vc_custom_1784700767676{background-image: url(https:\/\/deltar.it\/wp-content\/uploads\/2026\/07\/nichelatura-chimica-banner1-scaled.webp?id=2532) !important;background-position: center !important;background-repeat: no-repeat !important;background-size: cover !important;}” wpex_bg_overlay=”color” wpex_bg_overlay_color=”#00000080″ wpex_bg_overlay_opacity=”1″][vc_column][vc_row_inner content_placement=”bottom” el_class=”pbd100″][vc_column_inner el_class=”fade-up”][vc_column_text css=”” el_class=”dt-label dt-big-label dt-inner-h1″ color=”on-accent” letter_spacing=”10%” font_weight=”700″ text_transform=”uppercase”]\n

Medium-phosphorus electroless nickel plating (ENP 79)<\/h1>\n[\/vc_column_text][vc_column_text css=”” el_class=”mtd30 mbd20 mtm20 mbm20 dt-remove-br-md dt-inner-h2″ color=”on-accent”]\n

The balance between
\nmechanical performance and
\nanti-corrosion protection<\/h2>\n[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row][vc_row full_width=”stretch_row_content” el_class=”dt-container-w”][vc_column][vc_row_inner content_placement=”top” el_class=”ptd100 pbd100 ptm60 pbm60 dt-about dt-m-reverse”][vc_column_inner el_class=”fade-up mtm30″ width=”1\/2″]
\"Componenti<\/div><\/figure>[\/vc_column_inner][vc_column_inner el_class=”fade-up” width=”1\/2″][vc_column_text css=”” color=”#222222″ text_transform=”none” el_class=”dt-h2 dt-remove-br-md ptd20″]\n

Medium-phosphorus
\nelectroless nickel plating<\/h2>\n[\/vc_column_text][vc_column_text css=”” color=”#353639″ font_size=”d:17px|tp:16px” el_class=”ptd20 ptm15 dt-remove-br-md”]The medium-phosphorus electroless nickel plating treatment, indicated in the Deltar procedure as ENP 79, is an autocatalytic nickel-phosphorus alloy with a P content between 5% and 9% by weight.
\nIt is the most versatile choice among the three phosphorus levels: it offers an optimal compromise between the mechanical performance of low phosphorus and the anti-corrosion resistance of high phosphorus, without going to extremes on either characteristic.[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row][vc_row full_width=”stretch_row_content” el_class=”dt-sm-container-w” wpex_bg_overlay=”color” wpex_bg_overlay_color=”palette-290″ wpex_bg_overlay_opacity=”80%” css=”.vc_custom_1784095945319{background-image: url(https:\/\/deltar.it\/wp-content\/uploads\/2026\/07\/caratteristiche-banner.webp?id=2515) !important;background-position: center !important;background-repeat: no-repeat !important;background-size: cover !important;}”][vc_column][vc_row_inner el_class=”ptd100 pbd100 ptm60 pbm60″][vc_column_inner el_class=”fade-up mbm30″ width=”1\/2″][vc_column_text css=”” color=”palette-295″ font_size=”clamp(22px, 2vw, 32px);” font_family=”Barlow” font_weight=”700″ el_class=”mbd10 mbm10 dt-title-min-h dt-inner-section-h2″ line_height=”1.15″]\n

Characteristics of the ENP 79 deposit<\/h2>\n[\/vc_column_text][vc_column_text css=”” color=”palette-295″ font_size=”16px”]Medium phosphorus offers a balanced behaviour of the deposit:<\/p>\n
    \n
  • Good \u201cas deposited\u201d hardness, intermediate between
    \nlow and high phosphorus<\/li>\n
  • Good wear and corrosion resistance in moderately
    \naggressive environments<\/li>\n
  • Excellent thickness uniformity, typical of
    \nautocatalytic processes<\/li>\n<\/ul>\n[\/vc_column_text][\/vc_column_inner][vc_column_inner el_class=”fade-up mbm30″ width=”1\/2″][vc_column_text css=”” color=”palette-295″ font_size=”clamp(22px, 2vw, 32px);” font_family=”Barlow” font_weight=”700″ el_class=”mbd10 mbm10 dt-title-min-h dt-inner-section-h2″ line_height=”1.15″]\n

    When to choose medium phosphorus<\/h2>\n[\/vc_column_text][vc_column_text css=”” color=”palette-295″ font_size=”16px” el_class=”dt-remove-br”]Medium phosphorus is recommended when the component must balance more than one requirement without favouring just one:<\/p>\n
      \n
    • Anti-corrosion protection in standard industrial
      \nenvironments (not strongly aggressive)<\/li>\n
    • Moderate wear resistance<\/li>\n
    • Thickness uniformity on complex geometries<\/li>\n<\/ul>\n

      It is the most balanced choice in cases where neither maximum hardness
      \nnor maximum anti-corrosion protection is the dominant design constraint.[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row][vc_row full_width=”stretch_row_content”][vc_column][vc_row_inner equal_height=”yes” el_class=”dt-x-full-w”][vc_column_inner el_class=”ptd75 pbd75 ptm60 pbm60″ width=”1\/2″][vc_column_text css=”” el_class=”mbd25 mbm25 fade-up” color=”#171717″]\n

      Typical applications<\/h2>\n[\/vc_column_text][vc_column_text css=”” font_size=”16px” color=”#353639″ el_class=”fade-up mtd100″ font_weight=”600″]\n
        \n
      • Mechanical components for standard industrial environments\/li><\/li>\n
      • Fittings and valves not intended for extreme environments<\/li>\n
      • Automotive components and general engineering<\/li>\n
      • Sealing elements and coupling seats in moderate environments<\/li>\n<\/ul>\n[\/vc_column_text][\/vc_column_inner][vc_column_inner el_class=”ptd75 pbd75 ptm60 pbm60″ width=”1\/2″][vc_column_text css=”” color=”palette-295″ el_class=”mbd45 mbm45 dt-remove-br-md fade-up”]\n

        The ENP 79 process
        \nat Deltar<\/h2>\n[\/vc_column_text][vc_column_text css=”” font_size=”16px” color=”palette-295″ el_class=”fade-up dt-remove-br-md” font_weight=”600″]The deposition process takes place chemically, without electric
        \ncurrent, through an autocatalytic process controlled
        \nin every parameter:<\/p>\n
          \n
        • Bath temperature: 88-91 \u00b0C<\/li>\n
        • Bath pH: 4.9-5.3<\/li>\n
        • Nickel concentration: 2.4-3.4 g\/L<\/li>\n
        • Continuous control of the composition with
          \ndedicated electronic instrumentation and daily verification
          \nby volumetric titration<\/li>\n<\/ul>\n

          The Deltar LS019 procedure complies with the main international
          \nstandards in the ENP sector: ASTM B117, B183, B322, B499, B571,
          \nB578, B602, B636, B656, B689, B733, ISO 4527, MIL-C-26074.[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row][vc_row full_width=”stretch_row_content” el_class=”dt-sm-container-w” wpex_bg_color=”#6e6e6e”][vc_column][vc_row_inner el_class=”ptd95 pbd40 ptm60 pbm40″][vc_column_inner el_class=”mbm30 fade-up” width=”1\/2″][vc_column_text css=”” el_class=”dt-remove-br-md” color=”palette-295″]\n

          Post-deposition
          \nheat treatments<\/h2>\n[\/vc_column_text][\/vc_column_inner][vc_column_inner el_class=”fade-up dt-remove-br-md” width=”1\/2″][vc_column_text css=”” color=”palette-295″ font_size=”16px” font_weight=”600″ el_class=”mbd25 mbm25 dt-remove-br-md”]When required, the ENP 79 deposit can be subjected to heat treatment for two purposes:[\/vc_column_text]