第五章金属修理件的保护处理PROTECTIVE TREATMENT OF METALLIC REPAIR PARTS一、General Information about Protective Treatments保护处理概述1. When you do a repair or rework procedure that breaks the surface of an initial structure, you must apply a protective treatment to the surface. The treatment makes a base for the paint and inhibits corrosion when you apply it before the installation of the repair parts.当修理破坏原始结构表面的时候，应进行表面保护处理。
在安装部件前，保护层附着在材料表面抵抗腐蚀。
2. Bare aluminum and magnesium alloys in initial structure need a subsequent chemical conversion coating if you use a repair process that will cause the area to corrode.对裸铝和镁合金进行可能导致腐蚀的修理时，应进行后续化学处理。
3. Bare aluminum alloy and the chamfered edges of clad aluminum alloy repair parts need a protective treatment before you apply a primer.裸铝和有倒角的包铝合金修理件在涂底漆前需要保护处理。
4. All steel parts need cadmium plating.所有钢件都需要镀镉。
5. If you use BMS 10-20 primer, then prepare the surface with the Alodine 600 chemical conversion coating. Do not use Alodine 1000 or Alodine 1200S in areas where you use BMS 10-20 primer material.涂BMS 10-20底漆前要用Alodine 600处理，不能用Alodine 1000 或Alodine 1200S。
6. If corrosion occurs on a structural component surface, the surface must be refinished. This is true even when the damage is not more than the applicable allowable damage limits. Refer to 20-40-00 of the Corrosion Prevention Manual and AMM if applicable.当结构部件表面发生腐蚀时，即使腐蚀没超过容许极限，也必须整修表面。
参考CPM 20-40-00和AMM。
7. Refer to 51-10-02, GENERAL for the mechanical cleanup procedure used to remove burrs or sharp edges.See Figure 5-1 for Corrosion removal tools.根据SRM51-10-02, GENERAL机械打磨去除毛刺。
腐蚀去除工具见Figure 5-1。
腐蚀去除Figure 5-1二、Aluminum Alloy-Brush Chemical Conversion Coating Process铝合金刷涂化学转化层1、When you work with powders or apply the solution to a surface, you must use a respirator, and wear goggles, rubber or neoprene gloves, boots and aprons that are made acid-resistant materials.Do not permit the solution or powder to touch your skin. If you do not obey,the corrosive chemicals can cause injury to personnel.要接触粉末及刷涂溶液时，必须戴呼吸器，护目镜以及耐酸的橡胶手套，靴子，围裙。
不要使溶液或粉末接触到皮肤。
防腐化学剂会对人体造成伤害。
2、The products that follow are approved for use to make a chemical film on aluminum alloys: Alodine，Iridite and Turcoat Alumigold.常用的铝合金化学转化剂有：Alodine，Iridite和Turcoat Alumigold。
3、Materials and Equipment Needed:所需材料和设备：(1) One of the following:(a) Alodine 1200S powder, or(b) Iridite 14-2 powder, or(c) Turcoat Alumigold B powder, or(d) Alodine 600 powder.下列粉末Alodine 1200S，Iridite 14-2，Turcoat Alumigold B或者Alodine 600之一。
(2) Tyco Wheels - Type 3A, very fine aluminum oxide wheels,Scotch-Brite pad, Type A, very fine aluminum oxide pads or 400-grit aluminum oxide paper.(3) Cheesecloth or new rags that contain less than 0.75 percent oil .无油棉布(4) Solvent - General cleaning of metal (Series 88) (refer to SOPM20-30-88).溶剂4、Alodine 1200S Solution Preparation阿罗丁1200S配制。
(1) Prepare the brush chemical conversion coating solution.NOTE: Prepare the solution in small quantities. A solution that is not used in 24 hours is not usable and should be thrown away. A dirty solution is unsatisfactory.准备刷涂溶液。
注意：要少量配制，必须24小时之内使用，没有使用的要丢弃。
溶液保持洁净。
(2) Mix 3 ounces of Alodine 1200S powder and 1 gallon of deionized or distilled water in a polyethylene, stainless steel or equivalent container. 在聚乙烯，不锈钢或同等容器中，将3盎司Alodine 1200S粉末与1加仑去离子水（或蒸馏水）混合(3) Mix until powder is dissolved.粉末充分溶化。
(4) Let solution stand at least 1 hour before it is used.使用前至少静置1小时。
5、Prepare the surface for chemical conversion coating application.化学转化处理前准备。
(1)Mask all of the surface areas that don’t need treat.遮蔽保护不需要处理的表面。
(a) Seal or plug all possible entry points to assemblies with honeycomb or foam plastic components with an applicable sealing or caulking material or with rubber plugs.用密封材料或橡胶塞密封堵住可能使溶液进入蜂窝，泡沫部件的孔洞。
(b) Painted, anodized or previously conversion-coated surfaces do not need to be masked.喷漆，阳极氧化或已转化处理过的表面不需遮蔽。
(2)Clean the area to be chemical conversion-coated with a solvent ordegreaser and a clean brush or rags. Dry with warm air or wipe dry.用洁净的刷子或抹布蘸溶剂、除油剂等清洁表面。
之后，用热风吹干或擦干。
(3)Remove the anodized,chemical conversion coatings mechanically.用机械方法从修理区域去除所有的表面层，化学转化层。
(4)Clean until all signs of coatings are gone and only a bright shinyaluminum surface shows. Wipe dry with a clean cheesecloth toremove loose particles and residue.清除所有涂层至露出洁净、有光泽的铝合金表面。
用干净的干抹布擦掉粉尘脏物。
(5)Allow a minimum of 15 minutes for the surface to dry.至少干燥15分钟。
(6)Remove all corrosion that may have occurred as given in steps (1) thru(5) above.清除在(1) 到(5)中可能出现的腐蚀。