CN111515099A - 一种钢结构表面无气喷涂工艺 - Google Patents
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- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/002—Pretreatement
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- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
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- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/007—After-treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
- B05D3/0493—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases using vacuum
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
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- B05D7/54—No clear coat specified
- B05D7/544—No clear coat specified the first layer is let to dry at least partially before applying the second layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/52—Two layers
- B05D7/54—No clear coat specified
- B05D7/546—No clear coat specified each layer being cured, at least partially, separately
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
- B05D2202/10—Metallic substrate based on Fe
- B05D2202/15—Stainless steel
Abstract
本发明是一种钢结构表面无气喷涂工艺,其特征在于,包括以下步骤:(1)钢结构表面清理,(2)选择涂料,(3)对钢结构表面进行喷涂,(4)探伤检测。本发明涂料与钢结构表面之间的附着力好,采用高压无气喷涂,使得最终形成的涂膜平整细腻致密,效果好,延长钢结构使用寿命。
Description
技术领域
本发明涉及钢结构喷涂处理技术领域,尤其涉及一种钢结构表面无气喷涂工艺。
背景技术
钢结构具有质量轻、强度高、施工方便且具有良好的延性和抗震性等优点而被日益广泛地使用于建筑行业中,尤其是在超高层及大跨度建筑等方面显示出了强大的生命力。但是,曝露在野外环境中的钢结构,其表面极易与周围环境发生化学及电化学作用而锈蚀。因此需要在其表面涂覆一层防腐层以保护钢结构本体不被锈蚀。在对钢结构表面进行防腐处理时,大多是对钢结构表面进行简易地涂刷,涂料与钢结构表面粘结效果一般,使用寿命低。
发明内容
本发明旨在解决现有技术的不足,而提供一种钢结构表面无气喷涂工艺。
本发明为实现上述目的,采用以下技术方案:一种钢结构表面无气喷涂工艺,其特征在于,包括以下步骤:
(1)钢结构表面清理,
a清理钢结构表面的焊渣、附着物,并将焊缝打磨光滑;
b对钢结构表面整体进行除锈、打磨,使钢结构表面平整,并保持一定粗糙度;
c用清洁、无油的压缩空气吹净钢结构表面上的除锈打磨杂物;
(2)选择涂料,
(3)对钢结构表面进行喷涂,
e将钢结构放在密闭空间内;
f对钢结构表面进行第一次喷涂,采用高压无气喷涂,利用增压泵将涂料增至高压状态,涂料经管线进入喷枪后通过喷嘴喷出,使涂料形成扇形雾状,喷枪边喷边移动,使钢结构表面形成第一层涂膜;
g对第一层涂膜进行热固化,对密闭空间内进行升温,干膜后,降至常温;
h对钢结构表面进行第二次喷涂,采用高压无气喷涂,利用增压泵将涂料增至高压状态,涂料经管线进入喷枪后通过喷嘴喷出,使涂料形成扇形雾状,喷枪边喷边移动,使钢结构表面形成第二层涂膜;
i对第二层涂膜进行热固化,对密闭空间内进行升温,干膜后,降至常温;
(4)探伤检测,
采用超声波探伤仪判断第二层涂膜是否存在缺陷,确保检测后,第二层涂膜不受任何损伤。
特别的,所述步骤b中的除锈方法为喷砂除锈或酸洗除锈。
特别的,所述步骤b中钢结构表面的粗糙度为50~65μm。
特别的,所述步骤f中涂料压力为30Mpa~50Mpa,第一层涂膜厚度为80μm~100μm。
特别的,所述步骤g中干膜后第一层涂膜厚度缺损15-20μm;
特别的,所述步骤h中涂料压力为30Mpa~50Mpa,第二层涂膜厚度为150μm~200μm。
特别的,所述步骤i中干膜后第二层涂膜厚度缺损20-25μm。
本发明的有益效果是:本发明通过对钢结构进行表面清理,并且使其表面保持一定粗糙度,可增加涂料与钢结构表面之间的附着力,并且采用高压无气喷涂机再密闭空间内多次喷涂、热固化,使最终形成的涂膜平整细腻致密,效果好,延长钢结构使用寿命。
具体实施方式
下面结合实施例对本发明作进一步说明:
实施例1
一种钢结构表面无气喷涂工艺,其特征在于,包括以下步骤:
(1)钢结构表面清理,
a清理钢结构表面的焊渣、附着物,并将焊缝打磨光滑;
b对钢结构表面整体进行除锈、打磨,使钢结构表面平整,并保持一定粗糙度,其中,除锈方法为喷砂除锈,钢结构表面的粗糙度为50μm;
c用清洁、无油的压缩空气吹净钢结构表面上的除锈打磨杂物;
(2)选择涂料,
(3)对钢结构表面进行喷涂,
e将钢结构放在密闭空间内;
f对钢结构表面进行第一次喷涂,采用高压无气喷涂,利用增压泵将涂料增压到30Mpa,涂料经管线进入喷枪后通过喷嘴喷出,使涂料形成扇形雾状,喷枪边喷边移动,使钢结构表面形成第一层涂膜,第一层涂膜厚度为80μm;
g对第一层涂膜进行热固化,对密闭空间内进行升温,干膜后,降至常温,其中,第一层涂膜厚度缺损15μm;
h对钢结构表面进行第二次喷涂,采用高压无气喷涂,利用增压泵将涂料增压到30Mpa,涂料经管线进入喷枪后通过喷嘴喷出,使涂料形成扇形雾状,喷枪边喷边移动,使钢结构表面形成第二层涂膜,第二层涂膜厚度为150μm;
i对第二层涂膜进行热固化,对密闭空间内进行升温,干膜后,降至常温,其中,第二层涂膜厚度缺损20μm;
(4)探伤检测,
采用超声波探伤仪判断第二层涂膜是否存在缺陷,确保检测后,第二层涂膜不受任何损伤。
实施例2
一种钢结构表面无气喷涂工艺,其特征在于,包括以下步骤:
(1)钢结构表面清理,
a清理钢结构表面的焊渣、附着物,并将焊缝打磨光滑;
b对钢结构表面整体进行除锈、打磨,使钢结构表面平整,并保持一定粗糙度,其中,除锈方法为酸洗除锈,钢结构表面的粗糙度为65μm;
c用清洁、无油的压缩空气吹净钢结构表面上的除锈打磨杂物;
(2)选择涂料,
(3)对钢结构表面进行喷涂,
e将钢结构放在密闭空间内;
f对钢结构表面进行第一次喷涂,采用高压无气喷涂,利用增压泵将涂料增压到50Mpa,涂料经管线进入喷枪后通过喷嘴喷出,使涂料形成扇形雾状,喷枪边喷边移动,使钢结构表面形成第一层涂膜,第一层涂膜厚度为100μm;
g对第一层涂膜进行热固化,对密闭空间内进行升温,干膜后,降至常温,其中,第一层涂膜厚度缺损20μm;
h对钢结构表面进行第二次喷涂,采用高压无气喷涂,利用增压泵将涂料增压到50Mpa,涂料经管线进入喷枪后通过喷嘴喷出,使涂料形成扇形雾状,喷枪边喷边移动,使钢结构表面形成第二层涂膜,第二层涂膜厚度为200μm;
i对第二层涂膜进行热固化,对密闭空间内进行升温,干膜后,降至常温,其中,第二层涂膜厚度缺损25μm;
(4)探伤检测,
采用超声波探伤仪判断第二层涂膜是否存在缺陷,确保检测后,第二层涂膜不受任何损伤。
实施例3
一种钢结构表面无气喷涂工艺,其特征在于,包括以下步骤:
(1)钢结构表面清理,
a清理钢结构表面的焊渣、附着物,并将焊缝打磨光滑;
b对钢结构表面整体进行除锈、打磨,使钢结构表面平整,并保持一定粗糙度,其中,除锈方法为喷砂除锈,钢结构表面的粗糙度为58μm;
c用清洁、无油的压缩空气吹净钢结构表面上的除锈打磨杂物;
(2)选择涂料,
(3)对钢结构表面进行喷涂,
e将钢结构放在密闭空间内;
f对钢结构表面进行第一次喷涂,采用高压无气喷涂,利用增压泵将涂料增压到40Mpa,涂料经管线进入喷枪后通过喷嘴喷出,使涂料形成扇形雾状,喷枪边喷边移动,使钢结构表面形成第一层涂膜,第一层涂膜厚度为90μm;
g对第一层涂膜进行热固化,对密闭空间内进行升温,干膜后,降至常温,其中,第一层涂膜厚度缺损18μm;
h对钢结构表面进行第二次喷涂,采用高压无气喷涂,利用增压泵将涂料增压到40Mpa,涂料经管线进入喷枪后通过喷嘴喷出,使涂料形成扇形雾状,喷枪边喷边移动,使钢结构表面形成第二层涂膜,第二层涂膜厚度为175μm;
i对第二层涂膜进行热固化,对密闭空间内进行升温,干膜后,降至常温,其中,第二层涂膜厚度缺损23μm;
(4)探伤检测,
采用超声波探伤仪判断第二层涂膜是否存在缺陷,确保检测后,第二层涂膜不受任何损伤。
上面对本发明进行了示例性描述,显然本发明具体实现并不受上述方式的限制,只要采用了本发明的方法构思和技术方案进行的各种改进,或未经改进直接应用于其它场合的,均在本发明的保护范围之内。
Claims (7)
1.一种钢结构表面无气喷涂工艺,其特征在于,包括以下步骤:
(1)钢结构表面清理,
a清理钢结构表面的焊渣、附着物,并将焊缝打磨光滑;
b对钢结构表面整体进行除锈、打磨,使钢结构表面平整,并保持一定粗糙度;
c用清洁、无油的压缩空气吹净钢结构表面上的除锈打磨杂物;
(2)选择涂料,
(3)对钢结构表面进行喷涂,
e将钢结构放在密闭空间内;
f对钢结构表面进行第一次喷涂,采用高压无气喷涂,利用增压泵将涂料增至高压状态,涂料经管线进入喷枪后通过喷嘴喷出,使涂料形成扇形雾状,喷枪边喷边移动,使钢结构表面形成第一层涂膜;
g对第一层涂膜进行热固化,对密闭空间内进行升温,干膜后,降至常温;
h对钢结构表面进行第二次喷涂,采用高压无气喷涂,利用增压泵将涂料增至高压状态,涂料经管线进入喷枪后通过喷嘴喷出,使涂料形成扇形雾状,喷枪边喷边移动,使钢结构表面形成第二层涂膜;
i对第二层涂膜进行热固化,对密闭空间内进行升温,干膜后,降至常温;
(4)探伤检测,
采用超声波探伤仪判断第二层涂膜是否存在缺陷,确保检测后,第二层涂膜不受任何损伤。
2.根据权利要求1所述的一种钢结构表面无气喷涂工艺,其特征在于,所述步骤b中的除锈方法为喷砂除锈或酸洗除锈。
3.根据权利要求1所述的一种钢结构表面无气喷涂工艺,其特征在于,所述步骤b中钢结构表面的粗糙度为50~65μm。
4.根据权利要求1所述的一种钢结构表面无气喷涂工艺,其特征在于,所述步骤f中涂料压力为30Mpa~50Mpa,第一层涂膜厚度为80μm~100μm。
5.根据权利要求1所述的一种钢结构表面无气喷涂工艺,其特征在于,所述步骤g中干膜后第一层涂膜厚度缺损15-20μm。
6.根据权利要求1所述的一种钢结构表面无气喷涂工艺,其特征在于,所述步骤h中涂料压力为30Mpa~50Mpa,第二层涂膜厚度为150μm~200μm。
7.根据权利要求1所述的一种钢结构表面无气喷涂工艺,其特征在于,所述步骤i中干膜后第二层涂膜厚度缺损20-25μm。
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