一、集裝箱鋼材表面處理的一般要求是：

1、 The general requirements for surface treatment of container steel are:

噴砂清潔度等級(jí)為 Sa2 12 。

The cleanliness level of sandblasting is Sa2 12.

表面灰塵等級(jí)不高于3。

The surface dust level shall not exceed 3.

表面粗糙度為 Rz25～5Oμm。

The surface roughness is Rz25-5O μ M.

二、集裝箱的表面處理工藝

2、 Surface Treatment Technology of Ganzhou Container

根據(jù)集裝箱生產(chǎn)過(guò)程的特征，集裝箱鋼材表面采用車間預(yù)涂工藝，在鋼板成型、拼裝前進(jìn)行自動(dòng)拋丸處理，然后涂裝 10μm 左右的車間底漆。完成鋼板成型、部裝和總裝之后，進(jìn)行二次噴砂處理，然后進(jìn)入集裝箱整箱噴漆工序。

According to the characteristics of the container production process, the surface of the container steel is pre coated in the workshop, and automatic shot blasting treatment is carried out before the steel plate is formed and assembled, and then coated with 10% μ Approximately m workshop primer. After completing the steel plate forming, partial assembly, and final assembly, a second sandblasting treatment is carried out, and then the entire container painting process is carried out.

原材料檢驗(yàn)

Raw material inspection

對(duì)原材料的原始狀況進(jìn)行檢驗(yàn)，查看是否有鐵銹、氧化皮及其它污染物。原材料銹蝕等級(jí)按 ISO 8501-1，分為 A、B、C、D 四個(gè)等級(jí)，C、D 級(jí)鋼材不宜使用。如果鋼材嚴(yán)重銹蝕或殘留大量的頑固附著物，則應(yīng)報(bào)廢。

Inspect the original condition of the raw materials to check for rust, scale, and other contaminants. The corrosion grade of raw materials is divided into four grades according to ISO 8501-1: A, B, C, and D. Grade C and D steel are not suitable for use. If the steel is severely corroded or has a large amount of stubborn attachments, it should be scrapped.

除油

Degreasing

所有鋼材在進(jìn)入平面拋丸機(jī)之前一定要油污，達(dá)到表面無(wú)可見(jiàn)油脂和污垢。

All steel must be cleaned of oil stains before entering the flat shot blasting machine to ensure that the surface is free of visible grease and dirt.

拋丸處理

Shot blasting treatment

拋丸是集裝箱鋼材預(yù)處理有效也常用的方法，通常采用自動(dòng)拋丸方法。為了達(dá)到一定的表面質(zhì)量，應(yīng)注意：

Shot blasting is an effective and commonly used method for container steel pretreatment, usually using automatic shot blasting. In order to achieve a certain surface quality, attention should be paid to:

選擇合適的磨料及適當(dāng)?shù)哪チ吓浔?。常用磨料有：菱角砂、鋼丸、鋼絲段等。

Choose the appropriate abrasive and appropriate abrasive ratio. Commonly used abrasives include diamond sand, steel shot, steel wire segment, etc.

經(jīng)常更換磨料以保持一定粒度。

Regularly replace abrasives to maintain a certain particle size.

濾去磨料中的細(xì)小顆粒、鐵銹和灰塵。

Filter out small particles, rust, and dust from the abrasive.

壓縮空氣及磨料應(yīng)避免水分、油污及其他污染。

Compressed air and abrasives should avoid moisture, oil contamination, and other contaminants.

拋丸后鋼材表面清潔度達(dá)到 Sa2 12 ，表面粗糙度為 Rz25~50μm。灰塵等殘留物應(yīng)在涂裝車間底漆之前用高壓空氣吹掃或真空吸塵等方法去除。

After shot blasting, the surface cleanliness of the steel reaches Sa2 12, and the surface roughness is Rz25~50 μ M. Dust and other residues should be removed by high-pressure air blowing or vacuum suction before painting the primer in the workshop.

產(chǎn)品

product

車間底漆涂裝及烘干

Workshop primer coating and drying

車間底漆是鋼材表面處理后的第—道防護(hù)涂膜，從拋丸到涂裝的間隔時(shí)間不應(yīng)超過(guò)4小時(shí)，如果超過(guò)，應(yīng)重新拋丸。如果干燥條件及通風(fēng)條件不利于底漆迅速干燥，為了防止粘漆，可適當(dāng)進(jìn)行烘干。

The workshop primer is the first protective coating on the surface of steel after treatment, and the interval from shot blasting to painting should not exceed 4 hours. If it exceeds 4 hours, it should be re shot blasted. If the drying and ventilation conditions are not conducive to the rapid drying of the primer, in order to prevent sticking, appropriate drying can be carried out.

成型、部裝、總裝

Forming, partial assembly, and final assembly

鋼板在進(jìn)行成型、拼裝時(shí)，應(yīng)注意不要讓已經(jīng)過(guò)表面處理和預(yù)涂底漆的表面再次污染，堆放在車間時(shí)應(yīng)采取適當(dāng)措施防塵和防潮。

When forming and assembling steel plates, attention should be paid not to let the surface that has already been treated and pre coated with primer contaminate again. When stacking in the workshop, appropriate measures should be taken to prevent dust and moisture.

二次噴砂

Secondary sandblasting

經(jīng)過(guò)大量焊接加工后，焊縫周圍會(huì)存在焊煙、飛濺和油漆灼傷等缺陷，焊縫本身也由于過(guò)于粗糙而不利于油漆的涂裝，在施工過(guò)程中還會(huì)存在油污及灰塵等污染，因此，總裝完成后，應(yīng)對(duì)焊縫周圍及仍然存在表面缺陷的鋼材部分進(jìn)行二次表面清理，通常在噴砂房采用手動(dòng)噴砂方法處理。

After a large amount of welding processing, there will be defects such as welding smoke, spatter, and paint burns around the weld seam. The weld seam itself is also too rough and not conducive to paint coating. During the construction process, there will also be pollution such as oil and dust. Therefore, after the final assembly is completed, secondary surface cleaning should be carried out on the circumference of the weld seam and the steel parts that still have surface defects, usually using manual sandblasting method in the sandblasting room.

在噴砂之前，必須采用適當(dāng)?shù)姆椒ㄇ謇砗托扪a(bǔ)焊接及氣割缺陷，如飛濺、不平焊縫、砂眼、氣孔、未焊透等，對(duì)不平焊縫應(yīng)采用手動(dòng)工具進(jìn)行打磨、修整、去除尖角。噴砂后，應(yīng)去除表面灰塵和油污，灰塵用壓縮空氣吹掃或真空吸塵等方法，油污用有機(jī)溶劑清洗干凈。

Before sandblasting, appropriate methods must be used to clean and repair welding and gas cutting defects, such as spatter, uneven welds, sand holes, air holes, incomplete welding, etc. For uneven welds, manual tools should be used to polish, trim, and remove sharp corners. After sandblasting, the surface dust and oil stains should be removed. The dust should be blown with compressed air or vacuum cleaned, and the oil stains should be cleaned with organic solvents.

檢查及修補(bǔ)

Inspection and repair

二次噴砂后，應(yīng)對(duì)噴涂表面的缺陷，尤其是焊縫缺陷進(jìn)行再次檢查和修補(bǔ)。對(duì)焊縫缺陷除了進(jìn)行常規(guī)觀察外，還應(yīng)進(jìn)行漏光檢查。方法是：進(jìn)入箱內(nèi)，關(guān)上箱門進(jìn)行觀察；有漏光的部位做上標(biāo)記，在噴漆之前修補(bǔ)好。對(duì)局部未達(dá)到表面預(yù)處理要求的區(qū)域，可用鐵刷、手動(dòng)工具等進(jìn)行修補(bǔ)。局部缺陷用手砂輪修補(bǔ)后應(yīng)達(dá)到表面清潔度 St3 等級(jí)。

After secondary sandblasting, defects on the sprayed surface, especially weld defects, should be rechecked and repaired. In addition to routine observation, leakage inspection should also be carried out for weld defects. The method is: enter the box, close the box door for observation; Mark the areas with light leaks and repair them before painting. For areas that do not meet the surface pre-treatment requirements locally, iron brushes, manual tools, etc. can be used for repair. After repairing local defects with hand grinding wheels, the surface cleanliness should reach St3 level.