Surface coatings for decreasing clamp load loss

A joint, comprising:

• a first component having a first surface with a first area;
• a second component having a second surface with a second area, wherein the first area of the first surface is in compressive contact from a compressive force with the second area of the second surface at an interface between the first surface of the first component and the second surface of the second component;
• a fastener inserted through the first area of the first component and the second area of the second component, wherein the compressive force is provided by a nut tightened onto the fastener;
• and
• a plurality of discrete friction coating regions comprising friction coating material deposited onto the first surface or the second surface within the first area or the second area respectively, wherein the plurality of discrete friction coating regions:
• are arranged in a pattern within the first area or the second area, each region of the plurality of discrete regions comprising a surface layer of friction coating particles disposed within a closed-shape having a defined perimeter;
• and
• define a plurality of interstitial spaces disposed between each of the plurality of discrete friction coating regions and a remainder of the plurality of discrete regions between defined perimeters of adjacent regions, wherein the plurality of interstitial spaces are devoid of the friction coating material;
• wherein the friction coating material comprises particles having a particle size in a range of approximately 5 μm to approximately 200 μm;
• and
• wherein the friction coating material deposited at the plurality of discrete regions on the first surface or the second surface held in contact with the other of the first surface or the second surface by the fastener.