临时保护涂层TEMPORARY PROTECTIVE COATINGS
1. INTRODUCTION 介绍
A. The data in this subject comes from Boeing Process Specification BAC5034 which superseded BAC5835. The airline has a copy of the Boeing Process Specification Manual.
本主题中的数据来源于取代 BAC5835 的波音工艺规范 BAC5034。航空公司有一份波音工艺规范手册。
B. The data is general. It is not about all situations or specific installations. Use it as a guide to help you write minimum standards.
数据具有通用性。它不涉及所有情况或特定安装。请将其作为指南，帮助您编写最低标准。
C. This subject tells about specific materials and methods to apply temporary protective coatings. The coatings are in four types: Removable Coatings, Nonadherent Films and Sheet Coverings, Preservatives, and Pressure-Sensitive Adhesive Tapes. These are then put into classes and grades which further specify usages and limitations. Refer to Figure 1 for further details.
本主题介绍了涂刷临时保护涂层的具体材料和方法。涂层分为四种类型： 可清除涂层、非粘附薄膜和薄片覆盖层、防腐剂和压敏胶带。这些类型又分为不同的类别和等级，进一步规定了用途和限制。详情请参见图 1。
D. Refer to SOPM 20-00-00 for a list of all the vendor names and addresses.
请参阅 SOPM 20-00-00，了解所有供应商的名称和地址。
2. MATERIALS 材料
A. Temporary Protective Coatings — Figure 1.
临时保护涂层 – 图 1。
B. Removers
去除剂
(1) For alkaline-removable coatings
用于碱性可去除涂层
(a) Alkasol 27, water-base, V0583B
(b) Cee Bee A-276B Remover, V71361
(c) Leeder 302N, V17209
(d) Leeder 783W, V17209
(e) Spraylat Remover SC1101S, water-base, V87354
(f) Tec 243 or 243P Remover, water-base, V25227
(2) For solvent-removable coatings
用于溶剂可去除涂料
(a) Leeder 787W, V17209
(b) Tec 900-I, solvent-base, V25227
(c) Turco 6015, V61102
3. SELECTION 选择
A. Generally, parts must have temporary protection during overhaul processes, and during storage and transportation.
一般情况下，在大修、储存和运输过程中，必须对零件进行临时保护。
B. When you move parts or put them in storage, use temporary protection per Figure 2.
当您移动零件或将其存放时，请按照图 2 使用临时保护。
NOTE: Figure 2 specifies minimum protection. Temporary protection applied for a given environment can stay on the parts for less severe conditions.
注： 图 2 规定了最低限度的保护。在特定环境下使用的临时保护可在不太恶劣的条件下留在零件上。
C. During overhaul processes, you can use these materials:
在大修过程中，可以使用这些材料：
(1) Forming, shearing — Type 1, class 1, grade A; or Type 4, class 1, grade A
成型、剪切 — 类型 1，1 类，A 级；或类型 4，1 类，A 级
(2) Machining or riveting — Type 1, class 1 or 2, grade A
加工或铆接 — 1 型，1 类或 2 类，A 级
(3) Prebond cleaning — Type 1, class 3, grade A
预粘接清洗 — 类型 1，3 类，A 级
(4) Chemical milling or plating — Type 1, class 3, grade B
化学铣削或电镀 — 类型 1，3 类，B 级
(5) Chromic Acid Anodizing — Type 1, class 3, grade C
铬酸阳极氧化 — 类型 1，3 类，C 级
(6) Sulfuric Acid Anodizing — Type 1, class 3, grade D
硫酸阳极氧化 — 类型 1，3 类，D 级
(7) Painting, bonding, or sealing — Type 4, class 3
涂漆、粘接或密封 — 类型 4，3 类 4.
4. APPLICATION 应用
A. Type 1
类型 1
(1) Make sure the surfaces to be protected are clean.
确保要保护的表面清洁。
(2) Apply by dip, brush, spray methods, as appropriate. See Figure 3 for film thickness and cure recommendations.
视情况采用浸涂、刷涂或喷涂方法。有关涂膜厚度和固化建议，请参见图 3。
(3) When you use peelable materials, cover all openings to prevent coating removal by wind.
当使用可剥离材料时，应遮盖所有开口，防止涂层被风刮走。
B. Types 2, 3, 4
2、3、4 型
(1) Make sure the surfaces of the part or assembly are clean and painted, primed, plated, or otherwise protected against corrosion.
确保零件或组件表面清洁，并已上漆、涂底漆、电镀或采取其他防腐蚀措施。
(2) Wrap the part or assembly in the applicable covering.
用适用的覆盖层包裹零件或组件。
(3) Tape the covering securely, with masking tape or equivalent. Do not apply the tape to the surface of the part or assembly.
用遮蔽胶带或同等材料牢固地粘贴覆盖层。请勿将胶带应用到零件或组件的表面上。
(4) Attach Type 2 materials to prevent abrasion of underlying substrate or coatings. Tie or otherwise attach the edges of the covering so it will not billow or become unfastened in the wind. Attach the covering to prevent the entry of animal life or unwanted matter. Allow for air circulation.
粘贴 2 类材料，防止磨损底层基材或涂层。捆绑或以其他方式固定覆盖层的边缘，使其不会随风飘动或脱落。安装覆盖物以防止动物或不需要的物质进入。允许空气流通。
5. REMOVAL 拆除
A. Alkaline-Removable Coatings (Type 1)
碱性可去除涂层（1 类）
(1) Before applying remover, protect interfaces between lift fittings or similar fixtures and part surfaces from entry of remover solution and rinse water. Entrapment of these fluids may corrode metal surfaces.
在使用清除剂之前，应保护提升配件或类似固定装置与零件表面之间的界面，防止清除剂溶液和冲洗水进入。这些液体可能会腐蚀金属表面。
(2) Apply remover approximately 0.020 inch thick.
将清除剂涂抹约 0.020 英寸厚。
(3) Allow to soak in at least 10 minutes, but do not allow remover to dry. Do not allow remover to contact high strength steels (180 ksi or above). Do not allow remover to contact acrylic plastics longer than 60 minutes.
至少浸泡 10 分钟，但不要让清除剂变干。不要让清除剂接触高强度钢（180 ksi 或以上）。不要让清除剂接触丙烯酸塑料超过 60 分钟。
(4) Pressure wash with water up to 140°F.
用不超过 140°F 的水进行高压清洗。
(5) If residues remain, repeat application of remover or wipe surfaces with solvent.
如仍有残留物，重复使用清除剂或用溶剂擦拭表面。
B. Peelable Coatings (Type 1)
可剥涂层（类型 1）
(1) Break film and peel manually, removing coating in a manner to prevent damage to substrates.
用手掰开薄膜并剥离，去除涂层时应防止损坏基材。
(2) Check surface carefully for residue or particles. Clean as necessary.
仔细检查表面是否有残留物或颗粒。必要时进行清洁。
C. Hard Films (Type 3, Class 1, Grade A)
硬膜（3 类，1 级，A 级）
(1) Remove compound by soaking in or scrubbing with solvent, and vapor degreasing per 20-30-03.
用溶剂浸泡或擦洗，并按照 20-30-03 的规定进行蒸汽脱脂，以去除化合物。
D. Soft Films, Oils and Greases (Type 3, Class 1, Grade B and Type 3, Class 2)
软膜、油脂（3 类，1 级，B 级和 3 类，2 级）
(1) Solvent clean or vapor degrease per SOPM 20-30-03 or wipe clean.
按照 SOPM 20-30-03 进行溶剂清洗或蒸气脱脂或擦拭。